Finding the Fourth Proportional to 21,856,514.10, 30,643,909.50 and 21,856,514.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,856,514.10 : 30,643,909.50 = 21,856,514.10 : x
2. Step 2: Convert to fraction form
   21,856,514.10/30,643,909.50 = 21,856,514.10/x
3. Step 3: Cross multiply
   21,856,514.10x = 30,643,909.50 × 21,856,514.10
4. Step 4: Simplify right side
   21,856,514.10x = 669,769,040,065,874
5. Step 5: Solve for x
   x = 669,769,040,065,874/21,856,514.10
6. Step 6: Final answer
   x = 30,643,909.50