Finding the Fourth Proportional to 102,009.30, 152,864.55 and 91,479.30

Step by Step Solution

1. Step 1: Write the proportion equation
   102,009.30 : 152,864.55 = 91,479.30 : x
2. Step 2: Convert to fraction form
   102,009.30/152,864.55 = 91,479.30/x
3. Step 3: Cross multiply
   102,009.30x = 152,864.55 × 91,479.30
4. Step 4: Simplify right side
   102,009.30x = 13,983,942,028.82
5. Step 5: Solve for x
   x = 13,983,942,028.82/102,009.30
6. Step 6: Final answer
   x = 137,084.97