Finding the Fourth Proportional to 175,978.64, 242,808.48 and 99,499.28

Step by Step Solution

1. Step 1: Write the proportion equation
   175,978.64 : 242,808.48 = 99,499.28 : x
2. Step 2: Convert to fraction form
   175,978.64/242,808.48 = 99,499.28/x
3. Step 3: Cross multiply
   175,978.64x = 242,808.48 × 99,499.28
4. Step 4: Simplify right side
   175,978.64x = 24,159,268,937.89
5. Step 5: Solve for x
   x = 24,159,268,937.89/175,978.64
6. Step 6: Final answer
   x = 137,285.23