Finding the Fourth Proportional to 1,398.08, 1,929.62 and 925.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.08 : 1,929.62 = 925.99 : x
2. Step 2: Convert to fraction form
   1,398.08/1,929.62 = 925.99/x
3. Step 3: Cross multiply
   1,398.08x = 1,929.62 × 925.99
4. Step 4: Simplify right side
   1,398.08x = 1,786,808.82
5. Step 5: Solve for x
   x = 1,786,808.82/1,398.08
6. Step 6: Final answer
   x = 1,278.04