Finding the Fourth Proportional to 78,363.48, 108,142.38 and 42,553.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,363.48 : 108,142.38 = 42,553.80 : x
2. Step 2: Convert to fraction form
   78,363.48/108,142.38 = 42,553.80/x
3. Step 3: Cross multiply
   78,363.48x = 108,142.38 × 42,553.80
4. Step 4: Simplify right side
   78,363.48x = 4,601,869,210.04
5. Step 5: Solve for x
   x = 4,601,869,210.04/78,363.48
6. Step 6: Final answer
   x = 58,724.67