Finding the Fourth Proportional to 12,978,221.76, 19,467,398.25 and 3,393,621.36

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,221.76 : 19,467,398.25 = 3,393,621.36 : x
2. Step 2: Convert to fraction form
   12,978,221.76/19,467,398.25 = 3,393,621.36/x
3. Step 3: Cross multiply
   12,978,221.76x = 19,467,398.25 × 3,393,621.36
4. Step 4: Simplify right side
   12,978,221.76x = 66,064,978,524,826.62
5. Step 5: Solve for x
   x = 66,064,978,524,826.62/12,978,221.76
6. Step 6: Final answer
   x = 5,090,449.20