Finding the Fourth Proportional to 1,397.10, 1,927.38 and 837.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,397.10 : 1,927.38 = 837.30 : x
2. Step 2: Convert to fraction form
   1,397.10/1,927.38 = 837.30/x
3. Step 3: Cross multiply
   1,397.10x = 1,927.38 × 837.30
4. Step 4: Simplify right side
   1,397.10x = 1,613,795.27
5. Step 5: Solve for x
   x = 1,613,795.27/1,397.10
6. Step 6: Final answer
   x = 1,155.10