Finding the Fourth Proportional to 1,678.24, 2,516.59 and 898.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,678.24 : 2,516.59 = 898.10 : x
2. Step 2: Convert to fraction form
   1,678.24/2,516.59 = 898.10/x
3. Step 3: Cross multiply
   1,678.24x = 2,516.59 × 898.10
4. Step 4: Simplify right side
   1,678.24x = 2,260,156.56
5. Step 5: Solve for x
   x = 2,260,156.56/1,678.24
6. Step 6: Final answer
   x = 1,346.75