Finding the Fourth Proportional to 1,437.37, 2,155.84 and 686.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.37 : 2,155.84 = 686.69 : x
2. Step 2: Convert to fraction form
   1,437.37/2,155.84 = 686.69/x
3. Step 3: Cross multiply
   1,437.37x = 2,155.84 × 686.69
4. Step 4: Simplify right side
   1,437.37x = 1,480,393.77
5. Step 5: Solve for x
   x = 1,480,393.77/1,437.37
6. Step 6: Final answer
   x = 1,029.93