Finding the Fourth Proportional to 105,388.52, 157,946.92 and 91,824.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,388.52 : 157,946.92 = 91,824.71 : x
2. Step 2: Convert to fraction form
   105,388.52/157,946.92 = 91,824.71/x
3. Step 3: Cross multiply
   105,388.52x = 157,946.92 × 91,824.71
4. Step 4: Simplify right side
   105,388.52x = 14,503,430,124.39
5. Step 5: Solve for x
   x = 14,503,430,124.39/105,388.52
6. Step 6: Final answer
   x = 137,618.69