Finding the Fourth Proportional to 8,978,679, 12,390,578.42 and 4,904,298

Step by Step Solution

1. Step 1: Write the proportion equation
   8,978,679 : 12,390,578.42 = 4,904,298 : x
2. Step 2: Convert to fraction form
   8,978,679/12,390,578.42 = 4,904,298/x
3. Step 3: Cross multiply
   8,978,679x = 12,390,578.42 × 4,904,298
4. Step 4: Simplify right side
   8,978,679x = 60,767,088,939,527.66
5. Step 5: Solve for x
   x = 60,767,088,939,527.66/8,978,679
6. Step 6: Final answer
   x = 6,767,932.00