Finding the Fourth Proportional to 1,091.61, 1,507.61 and 951.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.61 : 1,507.61 = 951.08 : x
2. Step 2: Convert to fraction form
   1,091.61/1,507.61 = 951.08/x
3. Step 3: Cross multiply
   1,091.61x = 1,507.61 × 951.08
4. Step 4: Simplify right side
   1,091.61x = 1,433,852.56
5. Step 5: Solve for x
   x = 1,433,852.56/1,091.61
6. Step 6: Final answer
   x = 1,313.52