Finding the Fourth Proportional to 22,891.30, 31,978.70 and 22,891.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,891.30 : 31,978.70 = 22,891.30 : x
2. Step 2: Convert to fraction form
   22,891.30/31,978.70 = 22,891.30/x
3. Step 3: Cross multiply
   22,891.30x = 31,978.70 × 22,891.30
4. Step 4: Simplify right side
   22,891.30x = 732,034,015.31
5. Step 5: Solve for x
   x = 732,034,015.31/22,891.30
6. Step 6: Final answer
   x = 31,978.70