Finding the Fourth Proportional to 69,185.10, 103,631.85 and 57,521.10

Step by Step Solution

1. Step 1: Write the proportion equation
   69,185.10 : 103,631.85 = 57,521.10 : x
2. Step 2: Convert to fraction form
   69,185.10/103,631.85 = 57,521.10/x
3. Step 3: Cross multiply
   69,185.10x = 103,631.85 × 57,521.10
4. Step 4: Simplify right side
   69,185.10x = 5,961,018,007.04
5. Step 5: Solve for x
   x = 5,961,018,007.04/69,185.10
6. Step 6: Final answer
   x = 86,160.43