Finding the Fourth Proportional to 72,575.98, 108,870.86 and 28,206.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,575.98 : 108,870.86 = 28,206.16 : x
2. Step 2: Convert to fraction form
   72,575.98/108,870.86 = 28,206.16/x
3. Step 3: Cross multiply
   72,575.98x = 108,870.86 × 28,206.16
4. Step 4: Simplify right side
   72,575.98x = 3,070,828,896.50
5. Step 5: Solve for x
   x = 3,070,828,896.50/72,575.98
6. Step 6: Final answer
   x = 42,311.92