Finding the Fourth Proportional to 90,841.02, 136,267.29 and 28,513.98

Step by Step Solution

1. Step 1: Write the proportion equation
   90,841.02 : 136,267.29 = 28,513.98 : x
2. Step 2: Convert to fraction form
   90,841.02/136,267.29 = 28,513.98/x
3. Step 3: Cross multiply
   90,841.02x = 136,267.29 × 28,513.98
4. Step 4: Simplify right side
   90,841.02x = 3,885,522,781.71
5. Step 5: Solve for x
   x = 3,885,522,781.71/90,841.02
6. Step 6: Final answer
   x = 42,772.78