Finding the Fourth Proportional to 1,080.83, 1,491.56 and 608.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.83 : 1,491.56 = 608.76 : x
2. Step 2: Convert to fraction form
   1,080.83/1,491.56 = 608.76/x
3. Step 3: Cross multiply
   1,080.83x = 1,491.56 × 608.76
4. Step 4: Simplify right side
   1,080.83x = 907,999.02
5. Step 5: Solve for x
   x = 907,999.02/1,080.83
6. Step 6: Final answer
   x = 840.10