Finding the Fourth Proportional to 5,421.87, 8,131.86 and 2,499.93

Step by Step Solution

1. Step 1: Write the proportion equation
   5,421.87 : 8,131.86 = 2,499.93 : x
2. Step 2: Convert to fraction form
   5,421.87/8,131.86 = 2,499.93/x
3. Step 3: Cross multiply
   5,421.87x = 8,131.86 × 2,499.93
4. Step 4: Simplify right side
   5,421.87x = 20,329,080.77
5. Step 5: Solve for x
   x = 20,329,080.77/5,421.87
6. Step 6: Final answer
   x = 3,749.46