Finding the Fourth Proportional to 14,315.31, 21,476.34 and 5,990.67

Step by Step Solution

1. Step 1: Write the proportion equation
   14,315.31 : 21,476.34 = 5,990.67 : x
2. Step 2: Convert to fraction form
   14,315.31/21,476.34 = 5,990.67/x
3. Step 3: Cross multiply
   14,315.31x = 21,476.34 × 5,990.67
4. Step 4: Simplify right side
   14,315.31x = 128,657,665.75
5. Step 5: Solve for x
   x = 128,657,665.75/14,315.31
6. Step 6: Final answer
   x = 8,987.42