Finding the Fourth Proportional to 12,219,711.70, 18,340,065.15 and 5,406,769.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,219,711.70 : 18,340,065.15 = 5,406,769.30 : x
2. Step 2: Convert to fraction form
   12,219,711.70/18,340,065.15 = 5,406,769.30/x
3. Step 3: Cross multiply
   12,219,711.70x = 18,340,065.15 × 5,406,769.30
4. Step 4: Simplify right side
   12,219,711.70x = 99,160,501,213,019.89
5. Step 5: Solve for x
   x = 99,160,501,213,019.89/12,219,711.70
6. Step 6: Final answer
   x = 8,114,798.75