Finding the Fourth Proportional to 105,047.46, 157,439.78 and 52,471.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,047.46 : 157,439.78 = 52,471.62 : x
2. Step 2: Convert to fraction form
   105,047.46/157,439.78 = 52,471.62/x
3. Step 3: Cross multiply
   105,047.46x = 157,439.78 × 52,471.62
4. Step 4: Simplify right side
   105,047.46x = 8,261,120,309.04
5. Step 5: Solve for x
   x = 8,261,120,309.04/105,047.46
6. Step 6: Final answer
   x = 78,641.79