Finding the Fourth Proportional to 1,422.78, 2,132.42 and 1,011.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.78 : 2,132.42 = 1,011.06 : x
2. Step 2: Convert to fraction form
   1,422.78/2,132.42 = 1,011.06/x
3. Step 3: Cross multiply
   1,422.78x = 2,132.42 × 1,011.06
4. Step 4: Simplify right side
   1,422.78x = 2,155,999.51
5. Step 5: Solve for x
   x = 2,155,999.51/1,422.78
6. Step 6: Final answer
   x = 1,515.34