Finding the Fourth Proportional to 1,624.88, 2,242.09 and 916.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,624.88 : 2,242.09 = 916.69 : x
2. Step 2: Convert to fraction form
   1,624.88/2,242.09 = 916.69/x
3. Step 3: Cross multiply
   1,624.88x = 2,242.09 × 916.69
4. Step 4: Simplify right side
   1,624.88x = 2,055,301.48
5. Step 5: Solve for x
   x = 2,055,301.48/1,624.88
6. Step 6: Final answer
   x = 1,264.89