Finding the Fourth Proportional to 102,002.70, 152,712.45 and 91,505.10

Step by Step Solution

1. Step 1: Write the proportion equation
   102,002.70 : 152,712.45 = 91,505.10 : x
2. Step 2: Convert to fraction form
   102,002.70/152,712.45 = 91,505.10/x
3. Step 3: Cross multiply
   102,002.70x = 152,712.45 × 91,505.10
4. Step 4: Simplify right side
   102,002.70x = 13,973,968,008.50
5. Step 5: Solve for x
   x = 13,973,968,008.50/102,002.70
6. Step 6: Final answer
   x = 136,996.06