Finding the Fourth Proportional to 22,888.15, 31,569.33 and 21,005.83

Step by Step Solution

1. Step 1: Write the proportion equation
   22,888.15 : 31,569.33 = 21,005.83 : x
2. Step 2: Convert to fraction form
   22,888.15/31,569.33 = 21,005.83/x
3. Step 3: Cross multiply
   22,888.15x = 31,569.33 × 21,005.83
4. Step 4: Simplify right side
   22,888.15x = 663,139,979.19
5. Step 5: Solve for x
   x = 663,139,979.19/22,888.15
6. Step 6: Final answer
   x = 28,973.07