Finding the Fourth Proportional to 30,276.10, 42,421.10 and 30,276.10

Step by Step Solution

1. Step 1: Write the proportion equation
   30,276.10 : 42,421.10 = 30,276.10 : x
2. Step 2: Convert to fraction form
   30,276.10/42,421.10 = 30,276.10/x
3. Step 3: Cross multiply
   30,276.10x = 42,421.10 × 30,276.10
4. Step 4: Simplify right side
   30,276.10x = 1,284,345,465.71
5. Step 5: Solve for x
   x = 1,284,345,465.71/30,276.10
6. Step 6: Final answer
   x = 42,421.10