Finding the Fourth Proportional to 105,615.91, 158,756.02 and 91,748.62

Step by Step Solution

1. Step 1: Write the proportion equation
   105,615.91 : 158,756.02 = 91,748.62 : x
2. Step 2: Convert to fraction form
   105,615.91/158,756.02 = 91,748.62/x
3. Step 3: Cross multiply
   105,615.91x = 158,756.02 × 91,748.62
4. Step 4: Simplify right side
   105,615.91x = 14,565,645,751.69
5. Step 5: Solve for x
   x = 14,565,645,751.69/105,615.91
6. Step 6: Final answer
   x = 137,911.47