Finding the Fourth Proportional to 1,837.20, 2,538.71 and 1,338.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,837.20 : 2,538.71 = 1,338.99 : x
2. Step 2: Convert to fraction form
   1,837.20/2,538.71 = 1,338.99/x
3. Step 3: Cross multiply
   1,837.20x = 2,538.71 × 1,338.99
4. Step 4: Simplify right side
   1,837.20x = 3,399,307.30
5. Step 5: Solve for x
   x = 3,399,307.30/1,837.20
6. Step 6: Final answer
   x = 1,850.27