Finding the Fourth Proportional to 85,386.10, 117,823.88 and 49,569.12

Step by Step Solution

1. Step 1: Write the proportion equation
   85,386.10 : 117,823.88 = 49,569.12 : x
2. Step 2: Convert to fraction form
   85,386.10/117,823.88 = 49,569.12/x
3. Step 3: Cross multiply
   85,386.10x = 117,823.88 × 49,569.12
4. Step 4: Simplify right side
   85,386.10x = 5,840,426,046.59
5. Step 5: Solve for x
   x = 5,840,426,046.59/85,386.10
6. Step 6: Final answer
   x = 68,400.20