Finding the Fourth Proportional to 1,662.19, 2,293.71 and 916.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,662.19 : 2,293.71 = 916.15 : x
2. Step 2: Convert to fraction form
   1,662.19/2,293.71 = 916.15/x
3. Step 3: Cross multiply
   1,662.19x = 2,293.71 × 916.15
4. Step 4: Simplify right side
   1,662.19x = 2,101,386.71
5. Step 5: Solve for x
   x = 2,101,386.71/1,662.19
6. Step 6: Final answer
   x = 1,264.23