Finding the Fourth Proportional to 2,499.29, 3,749.28 and 917.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499.29 : 3,749.28 = 917.80 : x
2. Step 2: Convert to fraction form
   2,499.29/3,749.28 = 917.80/x
3. Step 3: Cross multiply
   2,499.29x = 3,749.28 × 917.80
4. Step 4: Simplify right side
   2,499.29x = 3,441,097.46
5. Step 5: Solve for x
   x = 3,441,097.46/2,499.29
6. Step 6: Final answer
   x = 1,376.83