Finding the Fourth Proportional to 78,239.33, 107,970.33 and 42,429.33

Step by Step Solution

1. Step 1: Write the proportion equation
   78,239.33 : 107,970.33 = 42,429.33 : x
2. Step 2: Convert to fraction form
   78,239.33/107,970.33 = 42,429.33/x
3. Step 3: Cross multiply
   78,239.33x = 107,970.33 × 42,429.33
4. Step 4: Simplify right side
   78,239.33x = 4,581,108,761.78
5. Step 5: Solve for x
   x = 4,581,108,761.78/78,239.33
6. Step 6: Final answer
   x = 58,552.51