Finding the Fourth Proportional to 1,398.05, 1,929.40 and 925.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.05 : 1,929.40 = 925.13 : x
2. Step 2: Convert to fraction form
   1,398.05/1,929.40 = 925.13/x
3. Step 3: Cross multiply
   1,398.05x = 1,929.40 × 925.13
4. Step 4: Simplify right side
   1,398.05x = 1,784,931.55
5. Step 5: Solve for x
   x = 1,784,931.55/1,398.05
6. Step 6: Final answer
   x = 1,276.73