Finding the Fourth Proportional to 31,084.01, 42,883.09 and 21,658.04

Step by Step Solution

1. Step 1: Write the proportion equation
   31,084.01 : 42,883.09 = 21,658.04 : x
2. Step 2: Convert to fraction form
   31,084.01/42,883.09 = 21,658.04/x
3. Step 3: Cross multiply
   31,084.01x = 42,883.09 × 21,658.04
4. Step 4: Simplify right side
   31,084.01x = 928,763,409.98
5. Step 5: Solve for x
   x = 928,763,409.98/31,084.01
6. Step 6: Final answer
   x = 29,879.14