Finding the Fourth Proportional to 1,411.86, 2,117.86 and 892.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.86 : 2,117.86 = 892.30 : x
2. Step 2: Convert to fraction form
   1,411.86/2,117.86 = 892.30/x
3. Step 3: Cross multiply
   1,411.86x = 2,117.86 × 892.30
4. Step 4: Simplify right side
   1,411.86x = 1,889,755.89
5. Step 5: Solve for x
   x = 1,889,755.89/1,411.86
6. Step 6: Final answer
   x = 1,338.49