Finding the Fourth Proportional to 1,061.98, 1,593.20 and 412.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.98 : 1,593.20 = 412.71 : x
2. Step 2: Convert to fraction form
   1,061.98/1,593.20 = 412.71/x
3. Step 3: Cross multiply
   1,061.98x = 1,593.20 × 412.71
4. Step 4: Simplify right side
   1,061.98x = 657,527.51
5. Step 5: Solve for x
   x = 657,527.51/1,061.98
6. Step 6: Final answer
   x = 619.15