Finding the Fourth Proportional to 105,389.52, 157,948.42 and 91,825.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,389.52 : 157,948.42 = 91,825.71 : x
2. Step 2: Convert to fraction form
   105,389.52/157,948.42 = 91,825.71/x
3. Step 3: Cross multiply
   105,389.52x = 157,948.42 × 91,825.71
4. Step 4: Simplify right side
   105,389.52x = 14,503,725,809.88
5. Step 5: Solve for x
   x = 14,503,725,809.88/105,389.52
6. Step 6: Final answer
   x = 137,620.19