Finding the Fourth Proportional to 82,275.60, 123,417.45 and 42,909.60

Step by Step Solution

1. Step 1: Write the proportion equation
   82,275.60 : 123,417.45 = 42,909.60 : x
2. Step 2: Convert to fraction form
   82,275.60/123,417.45 = 42,909.60/x
3. Step 3: Cross multiply
   82,275.60x = 123,417.45 × 42,909.60
4. Step 4: Simplify right side
   82,275.60x = 5,295,793,412.52
5. Step 5: Solve for x
   x = 5,295,793,412.52/82,275.60
6. Step 6: Final answer
   x = 64,366.51