Finding the Fourth Proportional to 1,049.86, 1,573.42 and 432.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,049.86 : 1,573.42 = 432.94 : x
2. Step 2: Convert to fraction form
   1,049.86/1,573.42 = 432.94/x
3. Step 3: Cross multiply
   1,049.86x = 1,573.42 × 432.94
4. Step 4: Simplify right side
   1,049.86x = 681,196.45
5. Step 5: Solve for x
   x = 681,196.45/1,049.86
6. Step 6: Final answer
   x = 648.85