Finding the Fourth Proportional to 1,431.40, 1,975.52 and 841.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.40 : 1,975.52 = 841.99 : x
2. Step 2: Convert to fraction form
   1,431.40/1,975.52 = 841.99/x
3. Step 3: Cross multiply
   1,431.40x = 1,975.52 × 841.99
4. Step 4: Simplify right side
   1,431.40x = 1,663,363.87
5. Step 5: Solve for x
   x = 1,663,363.87/1,431.40
6. Step 6: Final answer
   x = 1,162.05