Finding the Fourth Proportional to 61,947.10, 86,900.90 and 61,947.10

Step by Step Solution

1. Step 1: Write the proportion equation
   61,947.10 : 86,900.90 = 61,947.10 : x
2. Step 2: Convert to fraction form
   61,947.10/86,900.90 = 61,947.10/x
3. Step 3: Cross multiply
   61,947.10x = 86,900.90 × 61,947.10
4. Step 4: Simplify right side
   61,947.10x = 5,383,258,742.39
5. Step 5: Solve for x
   x = 5,383,258,742.39/61,947.10
6. Step 6: Final answer
   x = 86,900.90