Finding the Fourth Proportional to 78,440.50, 108,248.60 and 42,630.54

Step by Step Solution

1. Step 1: Write the proportion equation
   78,440.50 : 108,248.60 = 42,630.54 : x
2. Step 2: Convert to fraction form
   78,440.50/108,248.60 = 42,630.54/x
3. Step 3: Cross multiply
   78,440.50x = 108,248.60 × 42,630.54
4. Step 4: Simplify right side
   78,440.50x = 4,614,695,972.89
5. Step 5: Solve for x
   x = 4,614,695,972.89/78,440.50
6. Step 6: Final answer
   x = 58,830.53