Finding the Fourth Proportional to 138,196.52, 190,700.74 and 81,597

Step by Step Solution

1. Step 1: Write the proportion equation
   138,196.52 : 190,700.74 = 81,597 : x
2. Step 2: Convert to fraction form
   138,196.52/190,700.74 = 81,597/x
3. Step 3: Cross multiply
   138,196.52x = 190,700.74 × 81,597
4. Step 4: Simplify right side
   138,196.52x = 15,560,608,281.78
5. Step 5: Solve for x
   x = 15,560,608,281.78/138,196.52
6. Step 6: Final answer
   x = 112,597.69