Finding the Fourth Proportional to 78,473.80, 108,292.66 and 42,663.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,473.80 : 108,292.66 = 42,663.50 : x
2. Step 2: Convert to fraction form
   78,473.80/108,292.66 = 42,663.50/x
3. Step 3: Cross multiply
   78,473.80x = 108,292.66 × 42,663.50
4. Step 4: Simplify right side
   78,473.80x = 4,620,143,899.91
5. Step 5: Solve for x
   x = 4,620,143,899.91/78,473.80
6. Step 6: Final answer
   x = 58,874.99