Finding the Fourth Proportional to 20,665.17, 30,978.63 and 7,514.01

Step by Step Solution

1. Step 1: Write the proportion equation
   20,665.17 : 30,978.63 = 7,514.01 : x
2. Step 2: Convert to fraction form
   20,665.17/30,978.63 = 7,514.01/x
3. Step 3: Cross multiply
   20,665.17x = 30,978.63 × 7,514.01
4. Step 4: Simplify right side
   20,665.17x = 232,773,735.61
5. Step 5: Solve for x
   x = 232,773,735.61/20,665.17
6. Step 6: Final answer
   x = 11,264.06