Finding the Fourth Proportional to 12,912,944.35, 17,820,668.79 and 7,111,724.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912,944.35 : 17,820,668.79 = 7,111,724.62 : x
2. Step 2: Convert to fraction form
   12,912,944.35/17,820,668.79 = 7,111,724.62/x
3. Step 3: Cross multiply
   12,912,944.35x = 17,820,668.79 × 7,111,724.62
4. Step 4: Simplify right side
   12,912,944.35x = 126,735,688,978,708.61
5. Step 5: Solve for x
   x = 126,735,688,978,708.61/12,912,944.35
6. Step 6: Final answer
   x = 9,814,623.65