Finding the Fourth Proportional to 127,144.71, 175,487.61 and 99,494.64

Step by Step Solution

1. Step 1: Write the proportion equation
   127,144.71 : 175,487.61 = 99,494.64 : x
2. Step 2: Convert to fraction form
   127,144.71/175,487.61 = 99,494.64/x
3. Step 3: Cross multiply
   127,144.71x = 175,487.61 × 99,494.64
4. Step 4: Simplify right side
   127,144.71x = 17,460,076,581.41
5. Step 5: Solve for x
   x = 17,460,076,581.41/127,144.71
6. Step 6: Final answer
   x = 137,324.44