Finding the Fourth Proportional to 3,573.47, 4,931.64 and 2,157.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,573.47 : 4,931.64 = 2,157.50 : x
2. Step 2: Convert to fraction form
   3,573.47/4,931.64 = 2,157.50/x
3. Step 3: Cross multiply
   3,573.47x = 4,931.64 × 2,157.50
4. Step 4: Simplify right side
   3,573.47x = 10,640,013.30
5. Step 5: Solve for x
   x = 10,640,013.30/3,573.47
6. Step 6: Final answer
   x = 2,977.50