Finding the Fourth Proportional to 12,185,749.86, 16,818,139.67 and 7,715,720.43

Step by Step Solution

1. Step 1: Write the proportion equation
   12,185,749.86 : 16,818,139.67 = 7,715,720.43 : x
2. Step 2: Convert to fraction form
   12,185,749.86/16,818,139.67 = 7,715,720.43/x
3. Step 3: Cross multiply
   12,185,749.86x = 16,818,139.67 × 7,715,720.43
4. Step 4: Simplify right side
   12,185,749.86x = 129,764,063,846,412.47
5. Step 5: Solve for x
   x = 129,764,063,846,412.47/12,185,749.86
6. Step 6: Final answer
   x = 10,648,836.99