Finding the Fourth Proportional to 6,499,589.05, 8,978,775.66 and 5,191,123.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,499,589.05 : 8,978,775.66 = 5,191,123.18 : x
2. Step 2: Convert to fraction form
   6,499,589.05/8,978,775.66 = 5,191,123.18/x
3. Step 3: Cross multiply
   6,499,589.05x = 8,978,775.66 × 5,191,123.18
4. Step 4: Simplify right side
   6,499,589.05x = 46,609,930,456,645.80
5. Step 5: Solve for x
   x = 46,609,930,456,645.80/6,499,589.05
6. Step 6: Final answer
   x = 7,171,211.92