Finding the Fourth Proportional to 999.98, 1,499.98 and 452.06

Step by Step Solution

1. Step 1: Write the proportion equation
   999.98 : 1,499.98 = 452.06 : x
2. Step 2: Convert to fraction form
   999.98/1,499.98 = 452.06/x
3. Step 3: Cross multiply
   999.98x = 1,499.98 × 452.06
4. Step 4: Simplify right side
   999.98x = 678,080.96
5. Step 5: Solve for x
   x = 678,080.96/999.98
6. Step 6: Final answer
   x = 678.09