Finding the Fourth Proportional to 1,314.86, 1,813.86 and 872.19

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.86 : 1,813.86 = 872.19 : x
2. Step 2: Convert to fraction form
   1,314.86/1,813.86 = 872.19/x
3. Step 3: Cross multiply
   1,314.86x = 1,813.86 × 872.19
4. Step 4: Simplify right side
   1,314.86x = 1,582,030.55
5. Step 5: Solve for x
   x = 1,582,030.55/1,314.86
6. Step 6: Final answer
   x = 1,203.20