Finding the Fourth Proportional to 1,057.52, 1,457.88 and 900.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,057.52 : 1,457.88 = 900.56 : x
2. Step 2: Convert to fraction form
   1,057.52/1,457.88 = 900.56/x
3. Step 3: Cross multiply
   1,057.52x = 1,457.88 × 900.56
4. Step 4: Simplify right side
   1,057.52x = 1,312,908.41
5. Step 5: Solve for x
   x = 1,312,908.41/1,057.52
6. Step 6: Final answer
   x = 1,241.50