Finding the Fourth Proportional to 1,298.45, 1,789.98 and 925.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.45 : 1,789.98 = 925.28 : x
2. Step 2: Convert to fraction form
   1,298.45/1,789.98 = 925.28/x
3. Step 3: Cross multiply
   1,298.45x = 1,789.98 × 925.28
4. Step 4: Simplify right side
   1,298.45x = 1,656,237.17
5. Step 5: Solve for x
   x = 1,656,237.17/1,298.45
6. Step 6: Final answer
   x = 1,275.55