Finding the Fourth Proportional to 1,061.93, 1,583.38 and 1,021.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.93 : 1,583.38 = 1,021.30 : x
2. Step 2: Convert to fraction form
   1,061.93/1,583.38 = 1,021.30/x
3. Step 3: Cross multiply
   1,061.93x = 1,583.38 × 1,021.30
4. Step 4: Simplify right side
   1,061.93x = 1,617,097.57
5. Step 5: Solve for x
   x = 1,617,097.57/1,061.93
6. Step 6: Final answer
   x = 1,522.79