Finding the Fourth Proportional to 78,397.49, 108,188.72 and 42,586.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,397.49 : 108,188.72 = 42,586.71 : x
2. Step 2: Convert to fraction form
   78,397.49/108,188.72 = 42,586.71/x
3. Step 3: Cross multiply
   78,397.49x = 108,188.72 × 42,586.71
4. Step 4: Simplify right side
   78,397.49x = 4,607,401,430.98
5. Step 5: Solve for x
   x = 4,607,401,430.98/78,397.49
6. Step 6: Final answer
   x = 58,769.76