Finding the Fourth Proportional to 69,123.97, 103,685.90 and 39,521.05

Step by Step Solution

1. Step 1: Write the proportion equation
   69,123.97 : 103,685.90 = 39,521.05 : x
2. Step 2: Convert to fraction form
   69,123.97/103,685.90 = 39,521.05/x
3. Step 3: Cross multiply
   69,123.97x = 103,685.90 × 39,521.05
4. Step 4: Simplify right side
   69,123.97x = 4,097,775,638.20
5. Step 5: Solve for x
   x = 4,097,775,638.20/69,123.97
6. Step 6: Final answer
   x = 59,281.54