Finding the Fourth Proportional to 12,978,114.18, 19,467,236.82 and 3,393,513.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,114.18 : 19,467,236.82 = 3,393,513.78 : x
2. Step 2: Convert to fraction form
   12,978,114.18/19,467,236.82 = 3,393,513.78/x
3. Step 3: Cross multiply
   12,978,114.18x = 19,467,236.82 × 3,393,513.78
4. Step 4: Simplify right side
   12,978,114.18x = 66,062,336,407,193.38
5. Step 5: Solve for x
   x = 66,062,336,407,193.38/12,978,114.18
6. Step 6: Final answer
   x = 5,090,287.81