Finding the Fourth Proportional to 312,298, 468,459.96 and 90,682

Step by Step Solution

1. Step 1: Write the proportion equation
   312,298 : 468,459.96 = 90,682 : x
2. Step 2: Convert to fraction form
   312,298/468,459.96 = 90,682/x
3. Step 3: Cross multiply
   312,298x = 468,459.96 × 90,682
4. Step 4: Simplify right side
   312,298x = 42,480,886,092.72
5. Step 5: Solve for x
   x = 42,480,886,092.72/312,298
6. Step 6: Final answer
   x = 136,026.76