Finding the Fourth Proportional to 1,356.39, 1,870.82 and 983.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.39 : 1,870.82 = 983.99 : x
2. Step 2: Convert to fraction form
   1,356.39/1,870.82 = 983.99/x
3. Step 3: Cross multiply
   1,356.39x = 1,870.82 × 983.99
4. Step 4: Simplify right side
   1,356.39x = 1,840,868.17
5. Step 5: Solve for x
   x = 1,840,868.17/1,356.39
6. Step 6: Final answer
   x = 1,357.18