Finding the Fourth Proportional to 1,887.86, 2,831.84 and 1,113.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,887.86 : 2,831.84 = 1,113.31 : x
2. Step 2: Convert to fraction form
   1,887.86/2,831.84 = 1,113.31/x
3. Step 3: Cross multiply
   1,887.86x = 2,831.84 × 1,113.31
4. Step 4: Simplify right side
   1,887.86x = 3,152,715.79
5. Step 5: Solve for x
   x = 3,152,715.79/1,887.86
6. Step 6: Final answer
   x = 1,669.99