Finding the Fourth Proportional to 1,242.38, 1,870.77 and 898.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,242.38 : 1,870.77 = 898.06 : x
2. Step 2: Convert to fraction form
   1,242.38/1,870.77 = 898.06/x
3. Step 3: Cross multiply
   1,242.38x = 1,870.77 × 898.06
4. Step 4: Simplify right side
   1,242.38x = 1,680,063.71
5. Step 5: Solve for x
   x = 1,680,063.71/1,242.38
6. Step 6: Final answer
   x = 1,352.29