Finding the Fourth Proportional to 1,666.34, 2,499.27 and 916.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,666.34 : 2,499.27 = 916.08 : x
2. Step 2: Convert to fraction form
   1,666.34/2,499.27 = 916.08/x
3. Step 3: Cross multiply
   1,666.34x = 2,499.27 × 916.08
4. Step 4: Simplify right side
   1,666.34x = 2,289,531.26
5. Step 5: Solve for x
   x = 2,289,531.26/1,666.34
6. Step 6: Final answer
   x = 1,373.99