Finding the Fourth Proportional to 9,917.12, 13,680.42 and 5,937.05

Step by Step Solution

1. Step 1: Write the proportion equation
   9,917.12 : 13,680.42 = 5,937.05 : x
2. Step 2: Convert to fraction form
   9,917.12/13,680.42 = 5,937.05/x
3. Step 3: Cross multiply
   9,917.12x = 13,680.42 × 5,937.05
4. Step 4: Simplify right side
   9,917.12x = 81,221,337.56
5. Step 5: Solve for x
   x = 81,221,337.56/9,917.12
6. Step 6: Final answer
   x = 8,190.01