Finding the Fourth Proportional to 7,478.71, 10,320.47 and 4,121.46

Step by Step Solution

1. Step 1: Write the proportion equation
   7,478.71 : 10,320.47 = 4,121.46 : x
2. Step 2: Convert to fraction form
   7,478.71/10,320.47 = 4,121.46/x
3. Step 3: Cross multiply
   7,478.71x = 10,320.47 × 4,121.46
4. Step 4: Simplify right side
   7,478.71x = 42,535,404.29
5. Step 5: Solve for x
   x = 42,535,404.29/7,478.71
6. Step 6: Final answer
   x = 5,687.53