Finding the Fourth Proportional to 12,978,928.72, 19,466,905.92 and 3,395,232.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,978,928.72 : 19,466,905.92 = 3,395,232.28 : x
2. Step 2: Convert to fraction form
   12,978,928.72/19,466,905.92 = 3,395,232.28/x
3. Step 3: Cross multiply
   12,978,928.72x = 19,466,905.92 × 3,395,232.28
4. Step 4: Simplify right side
   12,978,928.72x = 66,094,667,371,307.10
5. Step 5: Solve for x
   x = 66,094,667,371,307.10/12,978,928.72
6. Step 6: Final answer
   x = 5,092,459.39