Finding the Fourth Proportional to 12,486,978.82, 18,728,256.93 and 3,389,782.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,486,978.82 : 18,728,256.93 = 3,389,782.96 : x
2. Step 2: Convert to fraction form
   12,486,978.82/18,728,256.93 = 3,389,782.96/x
3. Step 3: Cross multiply
   12,486,978.82x = 18,728,256.93 × 3,389,782.96
4. Step 4: Simplify right side
   12,486,978.82x = 63,484,726,211,815.91
5. Step 5: Solve for x
   x = 63,484,726,211,815.91/12,486,978.82
6. Step 6: Final answer
   x = 5,084,074.15