Finding the Fourth Proportional to 78,440.61, 108,248.88 and 42,630.62

Step by Step Solution

1. Step 1: Write the proportion equation
   78,440.61 : 108,248.88 = 42,630.62 : x
2. Step 2: Convert to fraction form
   78,440.61/108,248.88 = 42,630.62/x
3. Step 3: Cross multiply
   78,440.61x = 108,248.88 × 42,630.62
4. Step 4: Simplify right side
   78,440.61x = 4,614,716,533.56
5. Step 5: Solve for x
   x = 4,614,716,533.56/78,440.61
6. Step 6: Final answer
   x = 58,830.71