Finding the Fourth Proportional to 31,011.48, 42,796.18 and 16,864.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,011.48 : 42,796.18 = 16,864.32 : x
2. Step 2: Convert to fraction form
   31,011.48/42,796.18 = 16,864.32/x
3. Step 3: Cross multiply
   31,011.48x = 42,796.18 × 16,864.32
4. Step 4: Simplify right side
   31,011.48x = 721,728,474.30
5. Step 5: Solve for x
   x = 721,728,474.30/31,011.48
6. Step 6: Final answer
   x = 23,272.95