Finding the Fourth Proportional to 128,077.56, 176,753.88 and 74,379.42

Step by Step Solution

1. Step 1: Write the proportion equation
   128,077.56 : 176,753.88 = 74,379.42 : x
2. Step 2: Convert to fraction form
   128,077.56/176,753.88 = 74,379.42/x
3. Step 3: Cross multiply
   128,077.56x = 176,753.88 × 74,379.42
4. Step 4: Simplify right side
   128,077.56x = 13,146,851,077.15
5. Step 5: Solve for x
   x = 13,146,851,077.15/128,077.56
6. Step 6: Final answer
   x = 102,647.58