Finding the Fourth Proportional to 82,315.98, 123,642.72 and 54,276.48

Step by Step Solution

1. Step 1: Write the proportion equation
   82,315.98 : 123,642.72 = 54,276.48 : x
2. Step 2: Convert to fraction form
   82,315.98/123,642.72 = 54,276.48/x
3. Step 3: Cross multiply
   82,315.98x = 123,642.72 × 54,276.48
4. Step 4: Simplify right side
   82,315.98x = 6,710,891,619.23
5. Step 5: Solve for x
   x = 6,710,891,619.23/82,315.98
6. Step 6: Final answer
   x = 81,525.99