Finding the Fourth Proportional to 820,425,294.72, 1,132,005,914.92 and 485,731,626.12

Step by Step Solution

1. Step 1: Write the proportion equation
   820,425,294.72 : 1,132,005,914.92 = 485,731,626.12 : x
2. Step 2: Convert to fraction form
   820,425,294.72/1,132,005,914.92 = 485,731,626.12/x
3. Step 3: Cross multiply
   820,425,294.72x = 1,132,005,914.92 × 485,731,626.12
4. Step 4: Simplify right side
   820,425,294.72x = 549,851,073,831,550,016
5. Step 5: Solve for x
   x = 549,851,073,831,550,016/820,425,294.72
6. Step 6: Final answer
   x = 670,202,488.11