Finding the Fourth Proportional to 82,715.40, 124,124.40 and 43,300.80

Step by Step Solution

1. Step 1: Write the proportion equation
   82,715.40 : 124,124.40 = 43,300.80 : x
2. Step 2: Convert to fraction form
   82,715.40/124,124.40 = 43,300.80/x
3. Step 3: Cross multiply
   82,715.40x = 124,124.40 × 43,300.80
4. Step 4: Simplify right side
   82,715.40x = 5,374,685,819.52
5. Step 5: Solve for x
   x = 5,374,685,819.52/82,715.40
6. Step 6: Final answer
   x = 64,978.06