Finding the Fourth Proportional to 1,410.48, 2,113.86 and 1,021.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.48 : 2,113.86 = 1,021.78 : x
2. Step 2: Convert to fraction form
   1,410.48/2,113.86 = 1,021.78/x
3. Step 3: Cross multiply
   1,410.48x = 2,113.86 × 1,021.78
4. Step 4: Simplify right side
   1,410.48x = 2,159,899.87
5. Step 5: Solve for x
   x = 2,159,899.87/1,410.48
6. Step 6: Final answer
   x = 1,531.32