Finding the Fourth Proportional to 82,767.02, 123,092.56 and 81,881.28

Step by Step Solution

1. Step 1: Write the proportion equation
   82,767.02 : 123,092.56 = 81,881.28 : x
2. Step 2: Convert to fraction form
   82,767.02/123,092.56 = 81,881.28/x
3. Step 3: Cross multiply
   82,767.02x = 123,092.56 × 81,881.28
4. Step 4: Simplify right side
   82,767.02x = 10,078,976,473.63
5. Step 5: Solve for x
   x = 10,078,976,473.63/82,767.02
6. Step 6: Final answer
   x = 121,775.28