Finding the Fourth Proportional to 105,390.52, 157,949.92 and 91,826.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,390.52 : 157,949.92 = 91,826.71 : x
2. Step 2: Convert to fraction form
   105,390.52/157,949.92 = 91,826.71/x
3. Step 3: Cross multiply
   105,390.52x = 157,949.92 × 91,826.71
4. Step 4: Simplify right side
   105,390.52x = 14,504,021,498.36
5. Step 5: Solve for x
   x = 14,504,021,498.36/105,390.52
6. Step 6: Final answer
   x = 137,621.69