Finding the Fourth Proportional to 13,420,456.52, 18,520,754.32 and 7,619,778

Step by Step Solution

1. Step 1: Write the proportion equation
   13,420,456.52 : 18,520,754.32 = 7,619,778 : x
2. Step 2: Convert to fraction form
   13,420,456.52/18,520,754.32 = 7,619,778/x
3. Step 3: Cross multiply
   13,420,456.52x = 18,520,754.32 × 7,619,778
4. Step 4: Simplify right side
   13,420,456.52x = 141,124,036,320,465.69
5. Step 5: Solve for x
   x = 141,124,036,320,465.69/13,420,456.52
6. Step 6: Final answer
   x = 10,515,591.34