Finding the Fourth Proportional to 105,146.52, 157,659.18 and 71,906.87

Step by Step Solution

1. Step 1: Write the proportion equation
   105,146.52 : 157,659.18 = 71,906.87 : x
2. Step 2: Convert to fraction form
   105,146.52/157,659.18 = 71,906.87/x
3. Step 3: Cross multiply
   105,146.52x = 157,659.18 × 71,906.87
4. Step 4: Simplify right side
   105,146.52x = 11,336,777,372.27
5. Step 5: Solve for x
   x = 11,336,777,372.27/105,146.52
6. Step 6: Final answer
   x = 107,818.85