Finding the Fourth Proportional to 85,609.62, 118,101.42 and 55,404.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,609.62 : 118,101.42 = 55,404.72 : x
2. Step 2: Convert to fraction form
   85,609.62/118,101.42 = 55,404.72/x
3. Step 3: Cross multiply
   85,609.62x = 118,101.42 × 55,404.72
4. Step 4: Simplify right side
   85,609.62x = 6,543,376,106.70
5. Step 5: Solve for x
   x = 6,543,376,106.70/85,609.62
6. Step 6: Final answer
   x = 76,432.72