Finding the Fourth Proportional to 1,091.34, 1,506.06 and 698.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,091.34 : 1,506.06 = 698.39 : x
2. Step 2: Convert to fraction form
   1,091.34/1,506.06 = 698.39/x
3. Step 3: Cross multiply
   1,091.34x = 1,506.06 × 698.39
4. Step 4: Simplify right side
   1,091.34x = 1,051,818.39
5. Step 5: Solve for x
   x = 1,051,818.39/1,091.34
6. Step 6: Final answer
   x = 963.78