Finding the Fourth Proportional to 1,431.85, 1,970.04 and 1,263.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,431.85 : 1,970.04 = 1,263.10 : x
2. Step 2: Convert to fraction form
   1,431.85/1,970.04 = 1,263.10/x
3. Step 3: Cross multiply
   1,431.85x = 1,970.04 × 1,263.10
4. Step 4: Simplify right side
   1,431.85x = 2,488,357.52
5. Step 5: Solve for x
   x = 2,488,357.52/1,431.85
6. Step 6: Final answer
   x = 1,737.86