Finding the Fourth Proportional to 78,149.77, 107,846.53 and 42,340.75

Step by Step Solution

1. Step 1: Write the proportion equation
   78,149.77 : 107,846.53 = 42,340.75 : x
2. Step 2: Convert to fraction form
   78,149.77/107,846.53 = 42,340.75/x
3. Step 3: Cross multiply
   78,149.77x = 107,846.53 × 42,340.75
4. Step 4: Simplify right side
   78,149.77x = 4,566,302,965.10
5. Step 5: Solve for x
   x = 4,566,302,965.10/78,149.77
6. Step 6: Final answer
   x = 58,430.15