Finding the Fourth Proportional to 78,474.80, 108,294.04 and 42,664.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,474.80 : 108,294.04 = 42,664.50 : x
2. Step 2: Convert to fraction form
   78,474.80/108,294.04 = 42,664.50/x
3. Step 3: Cross multiply
   78,474.80x = 108,294.04 × 42,664.50
4. Step 4: Simplify right side
   78,474.80x = 4,620,311,069.58
5. Step 5: Solve for x
   x = 4,620,311,069.58/78,474.80
6. Step 6: Final answer
   x = 58,876.37