Finding the Fourth Proportional to 1,432.99, 1,975.89 and 1,211.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,432.99 : 1,975.89 = 1,211.59 : x
2. Step 2: Convert to fraction form
   1,432.99/1,975.89 = 1,211.59/x
3. Step 3: Cross multiply
   1,432.99x = 1,975.89 × 1,211.59
4. Step 4: Simplify right side
   1,432.99x = 2,393,968.57
5. Step 5: Solve for x
   x = 2,393,968.57/1,432.99
6. Step 6: Final answer
   x = 1,670.61