Finding the Fourth Proportional to 840,142.72, 1,159,465.82 and 477,680.32

Step by Step Solution

1. Step 1: Write the proportion equation
   840,142.72 : 1,159,465.82 = 477,680.32 : x
2. Step 2: Convert to fraction form
   840,142.72/1,159,465.82 = 477,680.32/x
3. Step 3: Cross multiply
   840,142.72x = 1,159,465.82 × 477,680.32
4. Step 4: Simplify right side
   840,142.72x = 553,854,003,926.66
5. Step 5: Solve for x
   x = 553,854,003,926.66/840,142.72
6. Step 6: Final answer
   x = 659,238.00