Finding the Fourth Proportional to 78,572.35, 108,429.13 and 42,762.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,572.35 : 108,429.13 = 42,762.28 : x
2. Step 2: Convert to fraction form
   78,572.35/108,429.13 = 42,762.28/x
3. Step 3: Cross multiply
   78,572.35x = 108,429.13 × 42,762.28
4. Step 4: Simplify right side
   78,572.35x = 4,636,676,817.22
5. Step 5: Solve for x
   x = 4,636,676,817.22/78,572.35
6. Step 6: Final answer
   x = 59,011.56