Finding the Fourth Proportional to 2,428.83, 3,646.89 and 1,390.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,428.83 : 3,646.89 = 1,390.01 : x
2. Step 2: Convert to fraction form
   2,428.83/3,646.89 = 1,390.01/x
3. Step 3: Cross multiply
   2,428.83x = 3,646.89 × 1,390.01
4. Step 4: Simplify right side
   2,428.83x = 5,069,209.66
5. Step 5: Solve for x
   x = 5,069,209.66/2,428.83
6. Step 6: Final answer
   x = 2,087.10