Finding the Fourth Proportional to 1,105.83, 1,525.62 and 686.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105.83 : 1,525.62 = 686.52 : x
2. Step 2: Convert to fraction form
   1,105.83/1,525.62 = 686.52/x
3. Step 3: Cross multiply
   1,105.83x = 1,525.62 × 686.52
4. Step 4: Simplify right side
   1,105.83x = 1,047,368.64
5. Step 5: Solve for x
   x = 1,047,368.64/1,105.83
6. Step 6: Final answer
   x = 947.13