Finding the Fourth Proportional to 78,663.87, 108,555.17 and 42,853.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,663.87 : 108,555.17 = 42,853.12 : x
2. Step 2: Convert to fraction form
   78,663.87/108,555.17 = 42,853.12/x
3. Step 3: Cross multiply
   78,663.87x = 108,555.17 × 42,853.12
4. Step 4: Simplify right side
   78,663.87x = 4,651,927,240.98
5. Step 5: Solve for x
   x = 4,651,927,240.98/78,663.87
6. Step 6: Final answer
   x = 59,136.77