Finding the Fourth Proportional to 138,881.48, 208,259.94 and 82,748.02

Step by Step Solution

1. Step 1: Write the proportion equation
   138,881.48 : 208,259.94 = 82,748.02 : x
2. Step 2: Convert to fraction form
   138,881.48/208,259.94 = 82,748.02/x
3. Step 3: Cross multiply
   138,881.48x = 208,259.94 × 82,748.02
4. Step 4: Simplify right side
   138,881.48x = 17,233,097,680.32
5. Step 5: Solve for x
   x = 17,233,097,680.32/138,881.48
6. Step 6: Final answer
   x = 124,084.92