Finding the Fourth Proportional to 12,820,496.72, 19,240,154.06 and 10,326,266.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,820,496.72 : 19,240,154.06 = 10,326,266.96 : x
2. Step 2: Convert to fraction form
   12,820,496.72/19,240,154.06 = 10,326,266.96/x
3. Step 3: Cross multiply
   12,820,496.72x = 19,240,154.06 × 10,326,266.96
4. Step 4: Simplify right side
   12,820,496.72x = 198,678,967,175,087.88
5. Step 5: Solve for x
   x = 198,678,967,175,087.88/12,820,496.72
6. Step 6: Final answer
   x = 15,496,978.90