Finding the Fourth Proportional to 138,947.40, 208,700.10 and 82,897.02

Step by Step Solution

1. Step 1: Write the proportion equation
   138,947.40 : 208,700.10 = 82,897.02 : x
2. Step 2: Convert to fraction form
   138,947.40/208,700.10 = 82,897.02/x
3. Step 3: Cross multiply
   138,947.40x = 208,700.10 × 82,897.02
4. Step 4: Simplify right side
   138,947.40x = 17,300,617,146.33
5. Step 5: Solve for x
   x = 17,300,617,146.33/138,947.40
6. Step 6: Final answer
   x = 124,511.99