Finding the Fourth Proportional to 72,465.28, 99,959.72 and 45,565.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,465.28 : 99,959.72 = 45,565.20 : x
2. Step 2: Convert to fraction form
   72,465.28/99,959.72 = 45,565.20/x
3. Step 3: Cross multiply
   72,465.28x = 99,959.72 × 45,565.20
4. Step 4: Simplify right side
   72,465.28x = 4,554,684,633.74
5. Step 5: Solve for x
   x = 4,554,684,633.74/72,465.28
6. Step 6: Final answer
   x = 62,853.34