Finding the Fourth Proportional to 1,003.34, 1,505.01 and 272.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.34 : 1,505.01 = 272.99 : x
2. Step 2: Convert to fraction form
   1,003.34/1,505.01 = 272.99/x
3. Step 3: Cross multiply
   1,003.34x = 1,505.01 × 272.99
4. Step 4: Simplify right side
   1,003.34x = 410,845.15
5. Step 5: Solve for x
   x = 410,845.15/1,003.34
6. Step 6: Final answer
   x = 409.48