Finding the Fourth Proportional to 1,352.69, 1,866.01 and 880.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,352.69 : 1,866.01 = 880.01 : x
2. Step 2: Convert to fraction form
   1,352.69/1,866.01 = 880.01/x
3. Step 3: Cross multiply
   1,352.69x = 1,866.01 × 880.01
4. Step 4: Simplify right side
   1,352.69x = 1,642,095.93
5. Step 5: Solve for x
   x = 1,642,095.93/1,352.69
6. Step 6: Final answer
   x = 1,213.95