Finding the Fourth Proportional to 78,663.98, 108,555.86 and 42,853.90

Step by Step Solution

1. Step 1: Write the proportion equation
   78,663.98 : 108,555.86 = 42,853.90 : x
2. Step 2: Convert to fraction form
   78,663.98/108,555.86 = 42,853.90/x
3. Step 3: Cross multiply
   78,663.98x = 108,555.86 × 42,853.90
4. Step 4: Simplify right side
   78,663.98x = 4,652,041,968.85
5. Step 5: Solve for x
   x = 4,652,041,968.85/78,663.98
6. Step 6: Final answer
   x = 59,138.15