Finding the Fourth Proportional to 13,212,601.30, 19,787,409.15 and 13,212,601.30

Step by Step Solution

1. Step 1: Write the proportion equation
   13,212,601.30 : 19,787,409.15 = 13,212,601.30 : x
2. Step 2: Convert to fraction form
   13,212,601.30/19,787,409.15 = 13,212,601.30/x
3. Step 3: Cross multiply
   13,212,601.30x = 19,787,409.15 × 13,212,601.30
4. Step 4: Simplify right side
   13,212,601.30x = 261,443,147,858,921.88
5. Step 5: Solve for x
   x = 261,443,147,858,921.88/13,212,601.30
6. Step 6: Final answer
   x = 19,787,409.15