Finding the Fourth Proportional to 12,900,426.76, 17,802,358.66 and 7,019,860.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,900,426.76 : 17,802,358.66 = 7,019,860.36 : x
2. Step 2: Convert to fraction form
   12,900,426.76/17,802,358.66 = 7,019,860.36/x
3. Step 3: Cross multiply
   12,900,426.76x = 17,802,358.66 × 7,019,860.36
4. Step 4: Simplify right side
   12,900,426.76x = 124,970,071,871,836.72
5. Step 5: Solve for x
   x = 124,970,071,871,836.72/12,900,426.76
6. Step 6: Final answer
   x = 9,687,281.99