Finding the Fourth Proportional to 1,398.42, 1,929.10 and 956.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.42 : 1,929.10 = 956.34 : x
2. Step 2: Convert to fraction form
   1,398.42/1,929.10 = 956.34/x
3. Step 3: Cross multiply
   1,398.42x = 1,929.10 × 956.34
4. Step 4: Simplify right side
   1,398.42x = 1,844,875.49
5. Step 5: Solve for x
   x = 1,844,875.49/1,398.42
6. Step 6: Final answer
   x = 1,319.26