Finding the Fourth Proportional to 1,061.74, 1,586.12 and 845.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.74 : 1,586.12 = 845.56 : x
2. Step 2: Convert to fraction form
   1,061.74/1,586.12 = 845.56/x
3. Step 3: Cross multiply
   1,061.74x = 1,586.12 × 845.56
4. Step 4: Simplify right side
   1,061.74x = 1,341,159.63
5. Step 5: Solve for x
   x = 1,341,159.63/1,061.74
6. Step 6: Final answer
   x = 1,263.17