Finding the Fourth Proportional to 61,380.10, 86,107.10 and 61,380.10

Step by Step Solution

1. Step 1: Write the proportion equation
   61,380.10 : 86,107.10 = 61,380.10 : x
2. Step 2: Convert to fraction form
   61,380.10/86,107.10 = 61,380.10/x
3. Step 3: Cross multiply
   61,380.10x = 86,107.10 × 61,380.10
4. Step 4: Simplify right side
   61,380.10x = 5,285,262,408.71
5. Step 5: Solve for x
   x = 5,285,262,408.71/61,380.10
6. Step 6: Final answer
   x = 86,107.10