Finding the Fourth Proportional to 23,061.51, 31,824.56 and 12,990.98

Step by Step Solution

1. Step 1: Write the proportion equation
   23,061.51 : 31,824.56 = 12,990.98 : x
2. Step 2: Convert to fraction form
   23,061.51/31,824.56 = 12,990.98/x
3. Step 3: Cross multiply
   23,061.51x = 31,824.56 × 12,990.98
4. Step 4: Simplify right side
   23,061.51x = 413,432,334.51
5. Step 5: Solve for x
   x = 413,432,334.51/23,061.51
6. Step 6: Final answer
   x = 17,927.37