Finding the Fourth Proportional to 78,572.78, 108,428.36 and 42,762.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,572.78 : 108,428.36 = 42,762.03 : x
2. Step 2: Convert to fraction form
   78,572.78/108,428.36 = 42,762.03/x
3. Step 3: Cross multiply
   78,572.78x = 108,428.36 × 42,762.03
4. Step 4: Simplify right side
   78,572.78x = 4,636,616,783.17
5. Step 5: Solve for x
   x = 4,636,616,783.17/78,572.78
6. Step 6: Final answer
   x = 59,010.47