Finding the Fourth Proportional to 28,373.32, 42,562.86 and 10,857.88

Step by Step Solution

1. Step 1: Write the proportion equation
   28,373.32 : 42,562.86 = 10,857.88 : x
2. Step 2: Convert to fraction form
   28,373.32/42,562.86 = 10,857.88/x
3. Step 3: Cross multiply
   28,373.32x = 42,562.86 × 10,857.88
4. Step 4: Simplify right side
   28,373.32x = 462,142,426.34
5. Step 5: Solve for x
   x = 462,142,426.34/28,373.32
6. Step 6: Final answer
   x = 16,287.92