Finding the Fourth Proportional to 85,123.30, 117,469 and 47,397.55

Step by Step Solution

1. Step 1: Write the proportion equation
   85,123.30 : 117,469 = 47,397.55 : x
2. Step 2: Convert to fraction form
   85,123.30/117,469 = 47,397.55/x
3. Step 3: Cross multiply
   85,123.30x = 117,469 × 47,397.55
4. Step 4: Simplify right side
   85,123.30x = 5,567,742,800.95
5. Step 5: Solve for x
   x = 5,567,742,800.95/85,123.30
6. Step 6: Final answer
   x = 65,407.98