Finding the Fourth Proportional to 78,151.80, 107,849.34 and 42,342.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,151.80 : 107,849.34 = 42,342.72 : x
2. Step 2: Convert to fraction form
   78,151.80/107,849.34 = 42,342.72/x
3. Step 3: Cross multiply
   78,151.80x = 107,849.34 × 42,342.72
4. Step 4: Simplify right side
   78,151.80x = 4,566,634,405.80
5. Step 5: Solve for x
   x = 4,566,634,405.80/78,151.80
6. Step 6: Final answer
   x = 58,432.88