Finding the Fourth Proportional to 1,685.48, 2,525.34 and 916.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,685.48 : 2,525.34 = 916.52 : x
2. Step 2: Convert to fraction form
   1,685.48/2,525.34 = 916.52/x
3. Step 3: Cross multiply
   1,685.48x = 2,525.34 × 916.52
4. Step 4: Simplify right side
   1,685.48x = 2,314,524.62
5. Step 5: Solve for x
   x = 2,314,524.62/1,685.48
6. Step 6: Final answer
   x = 1,373.21