Finding the Fourth Proportional to 1,887.06, 2,828.55 and 911.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,887.06 : 2,828.55 = 911.82 : x
2. Step 2: Convert to fraction form
   1,887.06/2,828.55 = 911.82/x
3. Step 3: Cross multiply
   1,887.06x = 2,828.55 × 911.82
4. Step 4: Simplify right side
   1,887.06x = 2,579,128.46
5. Step 5: Solve for x
   x = 2,579,128.46/1,887.06
6. Step 6: Final answer
   x = 1,366.74