Finding the Fourth Proportional to 1,106.50, 1,526.30 and 870.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.50 : 1,526.30 = 870.08 : x
2. Step 2: Convert to fraction form
   1,106.50/1,526.30 = 870.08/x
3. Step 3: Cross multiply
   1,106.50x = 1,526.30 × 870.08
4. Step 4: Simplify right side
   1,106.50x = 1,328,002.57
5. Step 5: Solve for x
   x = 1,328,002.57/1,106.50
6. Step 6: Final answer
   x = 1,200.19