Finding the Fourth Proportional to 78,139.54, 107,832.12 and 42,330.24

Step by Step Solution

1. Step 1: Write the proportion equation
   78,139.54 : 107,832.12 = 42,330.24 : x
2. Step 2: Convert to fraction form
   78,139.54/107,832.12 = 42,330.24/x
3. Step 3: Cross multiply
   78,139.54x = 107,832.12 × 42,330.24
4. Step 4: Simplify right side
   78,139.54x = 4,564,559,519.31
5. Step 5: Solve for x
   x = 4,564,559,519.31/78,139.54
6. Step 6: Final answer
   x = 58,415.49