Finding the Fourth Proportional to 12,139,688.10, 18,206,616.15 and 7,011,027.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,139,688.10 : 18,206,616.15 = 7,011,027.30 : x
2. Step 2: Convert to fraction form
   12,139,688.10/18,206,616.15 = 7,011,027.30/x
3. Step 3: Cross multiply
   12,139,688.10x = 18,206,616.15 × 7,011,027.30
4. Step 4: Simplify right side
   12,139,688.10x = 127,647,082,868,270.88
5. Step 5: Solve for x
   x = 127,647,082,868,270.88/12,139,688.10
6. Step 6: Final answer
   x = 10,514,856.87