Finding the Fourth Proportional to 69,139.88, 103,797.34 and 42,420.20

Step by Step Solution

1. Step 1: Write the proportion equation
   69,139.88 : 103,797.34 = 42,420.20 : x
2. Step 2: Convert to fraction form
   69,139.88/103,797.34 = 42,420.20/x
3. Step 3: Cross multiply
   69,139.88x = 103,797.34 × 42,420.20
4. Step 4: Simplify right side
   69,139.88x = 4,403,103,922.27
5. Step 5: Solve for x
   x = 4,403,103,922.27/69,139.88
6. Step 6: Final answer
   x = 63,684.00