Finding the Fourth Proportional to 1,689.88, 2,535.72 and 703.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,689.88 : 2,535.72 = 703.12 : x
2. Step 2: Convert to fraction form
   1,689.88/2,535.72 = 703.12/x
3. Step 3: Cross multiply
   1,689.88x = 2,535.72 × 703.12
4. Step 4: Simplify right side
   1,689.88x = 1,782,915.45
5. Step 5: Solve for x
   x = 1,782,915.45/1,689.88
6. Step 6: Final answer
   x = 1,055.05