Finding the Fourth Proportional to 1,429.94, 1,972.74 and 898.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.94 : 1,972.74 = 898.50 : x
2. Step 2: Convert to fraction form
   1,429.94/1,972.74 = 898.50/x
3. Step 3: Cross multiply
   1,429.94x = 1,972.74 × 898.50
4. Step 4: Simplify right side
   1,429.94x = 1,772,506.89
5. Step 5: Solve for x
   x = 1,772,506.89/1,429.94
6. Step 6: Final answer
   x = 1,239.57