Finding the Fourth Proportional to 1,511.25, 2,085.35 and 881.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,511.25 : 2,085.35 = 881.91 : x
2. Step 2: Convert to fraction form
   1,511.25/2,085.35 = 881.91/x
3. Step 3: Cross multiply
   1,511.25x = 2,085.35 × 881.91
4. Step 4: Simplify right side
   1,511.25x = 1,839,086.61
5. Step 5: Solve for x
   x = 1,839,086.61/1,511.25
6. Step 6: Final answer
   x = 1,216.93