Finding the Fourth Proportional to 82,995.45, 124,329.15 and 45,488.40

Step by Step Solution

1. Step 1: Write the proportion equation
   82,995.45 : 124,329.15 = 45,488.40 : x
2. Step 2: Convert to fraction form
   82,995.45/124,329.15 = 45,488.40/x
3. Step 3: Cross multiply
   82,995.45x = 124,329.15 × 45,488.40
4. Step 4: Simplify right side
   82,995.45x = 5,655,534,106.86
5. Step 5: Solve for x
   x = 5,655,534,106.86/82,995.45
6. Step 6: Final answer
   x = 68,142.70