Finding the Fourth Proportional to 1,562.88, 2,156.71 and 899.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.88 : 2,156.71 = 899.76 : x
2. Step 2: Convert to fraction form
   1,562.88/2,156.71 = 899.76/x
3. Step 3: Cross multiply
   1,562.88x = 2,156.71 × 899.76
4. Step 4: Simplify right side
   1,562.88x = 1,940,521.39
5. Step 5: Solve for x
   x = 1,940,521.39/1,562.88
6. Step 6: Final answer
   x = 1,241.63