Finding the Fourth Proportional to 6,499,591.05, 8,978,778.42 and 5,191,125.18

Step by Step Solution

1. Step 1: Write the proportion equation
   6,499,591.05 : 8,978,778.42 = 5,191,125.18 : x
2. Step 2: Convert to fraction form
   6,499,591.05/8,978,778.42 = 5,191,125.18/x
3. Step 3: Cross multiply
   6,499,591.05x = 8,978,778.42 × 5,191,125.18
4. Step 4: Simplify right side
   6,499,591.05x = 46,609,962,741,702.61
5. Step 5: Solve for x
   x = 46,609,962,741,702.61/6,499,591.05
6. Step 6: Final answer
   x = 7,171,214.68