Finding the Fourth Proportional to 6,661,499.69, 9,977,115.45 and 5,213,156.85

Step by Step Solution

1. Step 1: Write the proportion equation
   6,661,499.69 : 9,977,115.45 = 5,213,156.85 : x
2. Step 2: Convert to fraction form
   6,661,499.69/9,977,115.45 = 5,213,156.85/x
3. Step 3: Cross multiply
   6,661,499.69x = 9,977,115.45 × 5,213,156.85
4. Step 4: Simplify right side
   6,661,499.69x = 52,012,267,751,408.33
5. Step 5: Solve for x
   x = 52,012,267,751,408.33/6,661,499.69
6. Step 6: Final answer
   x = 7,807,891.65