Finding the Fourth Proportional to 9,408,456.12, 12,990,982.88 and 7,229,564.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,408,456.12 : 12,990,982.88 = 7,229,564.76 : x
2. Step 2: Convert to fraction form
   9,408,456.12/12,990,982.88 = 7,229,564.76/x
3. Step 3: Cross multiply
   9,408,456.12x = 12,990,982.88 × 7,229,564.76
4. Step 4: Simplify right side
   9,408,456.12x = 93,919,152,027,011.31
5. Step 5: Solve for x
   x = 93,919,152,027,011.31/9,408,456.12
6. Step 6: Final answer
   x = 9,982,419.10