Finding the Fourth Proportional to 72,565.17, 108,889.28 and 28,186.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,565.17 : 108,889.28 = 28,186.18 : x
2. Step 2: Convert to fraction form
   72,565.17/108,889.28 = 28,186.18/x
3. Step 3: Cross multiply
   72,565.17x = 108,889.28 × 28,186.18
4. Step 4: Simplify right side
   72,565.17x = 3,069,172,538.69
5. Step 5: Solve for x
   x = 3,069,172,538.69/72,565.17
6. Step 6: Final answer
   x = 42,295.40