Finding the Fourth Proportional to 7,458.10, 10,456.70 and 7,458.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,458.10 : 10,456.70 = 7,458.10 : x
2. Step 2: Convert to fraction form
   7,458.10/10,456.70 = 7,458.10/x
3. Step 3: Cross multiply
   7,458.10x = 10,456.70 × 7,458.10
4. Step 4: Simplify right side
   7,458.10x = 77,987,114.27
5. Step 5: Solve for x
   x = 77,987,114.27/7,458.10
6. Step 6: Final answer
   x = 10,456.70