Finding the Fourth Proportional to 85,111.52, 117,446.64 and 47,389.28

Step by Step Solution

1. Step 1: Write the proportion equation
   85,111.52 : 117,446.64 = 47,389.28 : x
2. Step 2: Convert to fraction form
   85,111.52/117,446.64 = 47,389.28/x
3. Step 3: Cross multiply
   85,111.52x = 117,446.64 × 47,389.28
4. Step 4: Simplify right side
   85,111.52x = 5,565,711,708.02
5. Step 5: Solve for x
   x = 5,565,711,708.02/85,111.52
6. Step 6: Final answer
   x = 65,393.17