Finding the Fourth Proportional to 1,106.76, 1,526.72 and 686.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.76 : 1,526.72 = 686.96 : x
2. Step 2: Convert to fraction form
   1,106.76/1,526.72 = 686.96/x
3. Step 3: Cross multiply
   1,106.76x = 1,526.72 × 686.96
4. Step 4: Simplify right side
   1,106.76x = 1,048,795.57
5. Step 5: Solve for x
   x = 1,048,795.57/1,106.76
6. Step 6: Final answer
   x = 947.63