Finding the Fourth Proportional to 1,562.47, 2,156.20 and 899.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.47 : 2,156.20 = 899.45 : x
2. Step 2: Convert to fraction form
   1,562.47/2,156.20 = 899.45/x
3. Step 3: Cross multiply
   1,562.47x = 2,156.20 × 899.45
4. Step 4: Simplify right side
   1,562.47x = 1,939,406.33
5. Step 5: Solve for x
   x = 1,939,406.33/1,562.47
6. Step 6: Final answer
   x = 1,241.24