Finding the Fourth Proportional to 12,345,019.80, 18,442,445.50 and 7,991,604.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,345,019.80 : 18,442,445.50 = 7,991,604.55 : x
2. Step 2: Convert to fraction form
   12,345,019.80/18,442,445.50 = 7,991,604.55/x
3. Step 3: Cross multiply
   12,345,019.80x = 18,442,445.50 × 7,991,604.55
4. Step 4: Simplify right side
   12,345,019.80x = 147,384,731,330,969
5. Step 5: Solve for x
   x = 147,384,731,330,969/12,345,019.80
6. Step 6: Final answer
   x = 11,938,800.73