Finding the Fourth Proportional to 78,144.34, 107,839.06 and 42,334.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,144.34 : 107,839.06 = 42,334.50 : x
2. Step 2: Convert to fraction form
   78,144.34/107,839.06 = 42,334.50/x
3. Step 3: Cross multiply
   78,144.34x = 107,839.06 × 42,334.50
4. Step 4: Simplify right side
   78,144.34x = 4,565,312,685.57
5. Step 5: Solve for x
   x = 4,565,312,685.57/78,144.34
6. Step 6: Final answer
   x = 58,421.54