Finding the Fourth Proportional to 9,917.04, 14,877.72 and 2,991

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.04 : 14,877.72 = 2,991 : x
2. Step 2: Convert to fraction form
   9,917.04/14,877.72 = 2,991/x
3. Step 3: Cross multiply
   9,917.04x = 14,877.72 × 2,991
4. Step 4: Simplify right side
   9,917.04x = 44,499,260.52
5. Step 5: Solve for x
   x = 44,499,260.52/9,917.04
6. Step 6: Final answer
   x = 4,487.15