Finding the Fourth Proportional to 1,571.72, 2,168.39 and 973.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,571.72 : 2,168.39 = 973.94 : x
2. Step 2: Convert to fraction form
   1,571.72/2,168.39 = 973.94/x
3. Step 3: Cross multiply
   1,571.72x = 2,168.39 × 973.94
4. Step 4: Simplify right side
   1,571.72x = 2,111,876.89
5. Step 5: Solve for x
   x = 2,111,876.89/1,571.72
6. Step 6: Final answer
   x = 1,343.67