Finding the Fourth Proportional to 78,471.56, 108,292.88 and 42,664.04

Step by Step Solution

1. Step 1: Write the proportion equation
   78,471.56 : 108,292.88 = 42,664.04 : x
2. Step 2: Convert to fraction form
   78,471.56/108,292.88 = 42,664.04/x
3. Step 3: Cross multiply
   78,471.56x = 108,292.88 × 42,664.04
4. Step 4: Simplify right side
   78,471.56x = 4,620,211,764.04
5. Step 5: Solve for x
   x = 4,620,211,764.04/78,471.56
6. Step 6: Final answer
   x = 58,877.53