Finding the Fourth Proportional to 22,810.88, 31,492.94 and 21,399.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,810.88 : 31,492.94 = 21,399.05 : x
2. Step 2: Convert to fraction form
   22,810.88/31,492.94 = 21,399.05/x
3. Step 3: Cross multiply
   22,810.88x = 31,492.94 × 21,399.05
4. Step 4: Simplify right side
   22,810.88x = 673,918,969.44
5. Step 5: Solve for x
   x = 673,918,969.44/22,810.88
6. Step 6: Final answer
   x = 29,543.75