Finding the Fourth Proportional to 102,479.42, 152,700.38 and 91,300.20

Step by Step Solution

1. Step 1: Write the proportion equation
   102,479.42 : 152,700.38 = 91,300.20 : x
2. Step 2: Convert to fraction form
   102,479.42/152,700.38 = 91,300.20/x
3. Step 3: Cross multiply
   102,479.42x = 152,700.38 × 91,300.20
4. Step 4: Simplify right side
   102,479.42x = 13,941,575,234.08
5. Step 5: Solve for x
   x = 13,941,575,234.08/102,479.42
6. Step 6: Final answer
   x = 136,042.68