Finding the Fourth Proportional to 28,388.16, 42,567.12 and 10,847.88

Step by Step Solution

1. Step 1: Write the proportion equation
   28,388.16 : 42,567.12 = 10,847.88 : x
2. Step 2: Convert to fraction form
   28,388.16/42,567.12 = 10,847.88/x
3. Step 3: Cross multiply
   28,388.16x = 42,567.12 × 10,847.88
4. Step 4: Simplify right side
   28,388.16x = 461,763,009.71
5. Step 5: Solve for x
   x = 461,763,009.71/28,388.16
6. Step 6: Final answer
   x = 16,266.04