Finding the Fourth Proportional to 1,080.83, 1,619.88 and 463.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.83 : 1,619.88 = 463.80 : x
2. Step 2: Convert to fraction form
   1,080.83/1,619.88 = 463.80/x
3. Step 3: Cross multiply
   1,080.83x = 1,619.88 × 463.80
4. Step 4: Simplify right side
   1,080.83x = 751,300.34
5. Step 5: Solve for x
   x = 751,300.34/1,080.83
6. Step 6: Final answer
   x = 695.12