Finding the Fourth Proportional to 31,011.88, 42,794.64 and 16,864.72

Step by Step Solution

1. Step 1: Write the proportion equation
   31,011.88 : 42,794.64 = 16,864.72 : x
2. Step 2: Convert to fraction form
   31,011.88/42,794.64 = 16,864.72/x
3. Step 3: Cross multiply
   31,011.88x = 42,794.64 × 16,864.72
4. Step 4: Simplify right side
   31,011.88x = 721,719,621.10
5. Step 5: Solve for x
   x = 721,719,621.10/31,011.88
6. Step 6: Final answer
   x = 23,272.36