Finding the Fourth Proportional to 9,918.29, 14,877.50 and 3,997.90

Step by Step Solution

1. Step 1: Write the proportion equation
   9,918.29 : 14,877.50 = 3,997.90 : x
2. Step 2: Convert to fraction form
   9,918.29/14,877.50 = 3,997.90/x
3. Step 3: Cross multiply
   9,918.29x = 14,877.50 × 3,997.90
4. Step 4: Simplify right side
   9,918.29x = 59,478,755.86
5. Step 5: Solve for x
   x = 59,478,755.86/9,918.29
6. Step 6: Final answer
   x = 5,996.87