Finding the Fourth Proportional to 78,149.74, 107,846.75 and 42,339.76

Step by Step Solution

1. Step 1: Write the proportion equation
   78,149.74 : 107,846.75 = 42,339.76 : x
2. Step 2: Convert to fraction form
   78,149.74/107,846.75 = 42,339.76/x
3. Step 3: Cross multiply
   78,149.74x = 107,846.75 × 42,339.76
4. Step 4: Simplify right side
   78,149.74x = 4,566,205,145.80
5. Step 5: Solve for x
   x = 4,566,205,145.80/78,149.74
6. Step 6: Final answer
   x = 58,428.92