Finding the Fourth Proportional to 12,900,581.96, 17,802,805.76 and 7,099,363.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900,581.96 : 17,802,805.76 = 7,099,363.76 : x
2. Step 2: Convert to fraction form
   12,900,581.96/17,802,805.76 = 7,099,363.76/x
3. Step 3: Cross multiply
   12,900,581.96x = 17,802,805.76 × 7,099,363.76
4. Step 4: Simplify right side
   12,900,581.96x = 126,388,593,940,975.02
5. Step 5: Solve for x
   x = 126,388,593,940,975.02/12,900,581.96
6. Step 6: Final answer
   x = 9,797,123.45