Finding the Fourth Proportional to 9,131.86, 13,697.88 and 2,891.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.86 : 13,697.88 = 2,891.76 : x
2. Step 2: Convert to fraction form
   9,131.86/13,697.88 = 2,891.76/x
3. Step 3: Cross multiply
   9,131.86x = 13,697.88 × 2,891.76
4. Step 4: Simplify right side
   9,131.86x = 39,610,981.47
5. Step 5: Solve for x
   x = 39,610,981.47/9,131.86
6. Step 6: Final answer
   x = 4,337.67