Finding the Fourth Proportional to 1,562.51, 2,156.40 and 899.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,562.51 : 2,156.40 = 899.53 : x
2. Step 2: Convert to fraction form
   1,562.51/2,156.40 = 899.53/x
3. Step 3: Cross multiply
   1,562.51x = 2,156.40 × 899.53
4. Step 4: Simplify right side
   1,562.51x = 1,939,741.10
5. Step 5: Solve for x
   x = 1,939,741.10/1,562.51
6. Step 6: Final answer
   x = 1,241.42