Finding the Fourth Proportional to 61,946.10, 86,899.50 and 61,946.10

Step by Step Solution

1. Step 1: Write the proportion equation
   61,946.10 : 86,899.50 = 61,946.10 : x
2. Step 2: Convert to fraction form
   61,946.10/86,899.50 = 61,946.10/x
3. Step 3: Cross multiply
   61,946.10x = 86,899.50 × 61,946.10
4. Step 4: Simplify right side
   61,946.10x = 5,383,085,116.95
5. Step 5: Solve for x
   x = 5,383,085,116.95/61,946.10
6. Step 6: Final answer
   x = 86,899.50