Finding the Fourth Proportional to 78,572.57, 108,430.15 and 42,762.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,572.57 : 108,430.15 = 42,762.84 : x
2. Step 2: Convert to fraction form
   78,572.57/108,430.15 = 42,762.84/x
3. Step 3: Cross multiply
   78,572.57x = 108,430.15 × 42,762.84
4. Step 4: Simplify right side
   78,572.57x = 4,636,781,048.72
5. Step 5: Solve for x
   x = 4,636,781,048.72/78,572.57
6. Step 6: Final answer
   x = 59,012.72