Finding the Fourth Proportional to 3,807.10, 5,345.30 and 3,807.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,807.10 : 5,345.30 = 3,807.10 : x
2. Step 2: Convert to fraction form
   3,807.10/5,345.30 = 3,807.10/x
3. Step 3: Cross multiply
   3,807.10x = 5,345.30 × 3,807.10
4. Step 4: Simplify right side
   3,807.10x = 20,350,091.63
5. Step 5: Solve for x
   x = 20,350,091.63/3,807.10
6. Step 6: Final answer
   x = 5,345.30