Finding the Fourth Proportional to 1,373.82, 2,061.07 and 399.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,373.82 : 2,061.07 = 399.93 : x
2. Step 2: Convert to fraction form
   1,373.82/2,061.07 = 399.93/x
3. Step 3: Cross multiply
   1,373.82x = 2,061.07 × 399.93
4. Step 4: Simplify right side
   1,373.82x = 824,283.73
5. Step 5: Solve for x
   x = 824,283.73/1,373.82
6. Step 6: Final answer
   x = 599.99