Finding the Fourth Proportional to 1,188.76, 1,784.22 and 612.04

Step by Step Solution

1. Step 1: Write the proportion equation
   1,188.76 : 1,784.22 = 612.04 : x
2. Step 2: Convert to fraction form
   1,188.76/1,784.22 = 612.04/x
3. Step 3: Cross multiply
   1,188.76x = 1,784.22 × 612.04
4. Step 4: Simplify right side
   1,188.76x = 1,092,014.01
5. Step 5: Solve for x
   x = 1,092,014.01/1,188.76
6. Step 6: Final answer
   x = 918.62