Finding the Fourth Proportional to 12,978,929.72, 19,466,907.42 and 3,395,233.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,929.72 : 19,466,907.42 = 3,395,233.28 : x
2. Step 2: Convert to fraction form
   12,978,929.72/19,466,907.42 = 3,395,233.28/x
3. Step 3: Cross multiply
   12,978,929.72x = 19,466,907.42 × 3,395,233.28
4. Step 4: Simplify right side
   12,978,929.72x = 66,094,691,931,062.94
5. Step 5: Solve for x
   x = 66,094,691,931,062.94/12,978,929.72
6. Step 6: Final answer
   x = 5,092,460.89