Finding the Fourth Proportional to 129,499.56, 178,693.56 and 75,051.42

Step by Step Solution

1. Step 1: Write the proportion equation
   129,499.56 : 178,693.56 = 75,051.42 : x
2. Step 2: Convert to fraction form
   129,499.56/178,693.56 = 75,051.42/x
3. Step 3: Cross multiply
   129,499.56x = 178,693.56 × 75,051.42
4. Step 4: Simplify right side
   129,499.56x = 13,411,205,422.86
5. Step 5: Solve for x
   x = 13,411,205,422.86/129,499.56
6. Step 6: Final answer
   x = 103,561.78