Finding the Fourth Proportional to 1,393.16, 1,921.86 and 951.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.16 : 1,921.86 = 951.08 : x
2. Step 2: Convert to fraction form
   1,393.16/1,921.86 = 951.08/x
3. Step 3: Cross multiply
   1,393.16x = 1,921.86 × 951.08
4. Step 4: Simplify right side
   1,393.16x = 1,827,842.61
5. Step 5: Solve for x
   x = 1,827,842.61/1,393.16
6. Step 6: Final answer
   x = 1,312.01