Finding the Fourth Proportional to 31,048.02, 42,896.37 and 21,658.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,048.02 : 42,896.37 = 21,658.50 : x
2. Step 2: Convert to fraction form
   31,048.02/42,896.37 = 21,658.50/x
3. Step 3: Cross multiply
   31,048.02x = 42,896.37 × 21,658.50
4. Step 4: Simplify right side
   31,048.02x = 929,071,029.65
5. Step 5: Solve for x
   x = 929,071,029.65/31,048.02
6. Step 6: Final answer
   x = 29,923.68