Finding the Fourth Proportional to 1,106.18, 1,526.50 and 608.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,106.18 : 1,526.50 = 608.78 : x
2. Step 2: Convert to fraction form
   1,106.18/1,526.50 = 608.78/x
3. Step 3: Cross multiply
   1,106.18x = 1,526.50 × 608.78
4. Step 4: Simplify right side
   1,106.18x = 929,293.52
5. Step 5: Solve for x
   x = 929,293.52/1,106.18
6. Step 6: Final answer
   x = 840.09