Finding the Fourth Proportional to 130,752.59, 196,128.89 and 91,386.59

Step by Step Solution

1. Step 1: Write the proportion equation
   130,752.59 : 196,128.89 = 91,386.59 : x
2. Step 2: Convert to fraction form
   130,752.59/196,128.89 = 91,386.59/x
3. Step 3: Cross multiply
   130,752.59x = 196,128.89 × 91,386.59
4. Step 4: Simplify right side
   130,752.59x = 17,923,549,020.01
5. Step 5: Solve for x
   x = 17,923,549,020.01/130,752.59
6. Step 6: Final answer
   x = 137,079.88