Finding the Fourth Proportional to 69,139.13, 103,796.21 and 42,419.45

Step by Step Solution

1. Step 1: Write the proportion equation
   69,139.13 : 103,796.21 = 42,419.45 : x
2. Step 2: Convert to fraction form
   69,139.13/103,796.21 = 42,419.45/x
3. Step 3: Cross multiply
   69,139.13x = 103,796.21 × 42,419.45
4. Step 4: Simplify right side
   69,139.13x = 4,402,978,505.82
5. Step 5: Solve for x
   x = 4,402,978,505.82/69,139.13
6. Step 6: Final answer
   x = 63,682.88