Finding the Fourth Proportional to 1,100.35, 1,651.79 and 870.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.35 : 1,651.79 = 870.01 : x
2. Step 2: Convert to fraction form
   1,100.35/1,651.79 = 870.01/x
3. Step 3: Cross multiply
   1,100.35x = 1,651.79 × 870.01
4. Step 4: Simplify right side
   1,100.35x = 1,437,073.82
5. Step 5: Solve for x
   x = 1,437,073.82/1,100.35
6. Step 6: Final answer
   x = 1,306.02