Finding the Fourth Proportional to 91,768.20, 137,433.60 and 91,768.20

Step by Step Solution

1. Step 1: Write the proportion equation
   91,768.20 : 137,433.60 = 91,768.20 : x
2. Step 2: Convert to fraction form
   91,768.20/137,433.60 = 91,768.20/x
3. Step 3: Cross multiply
   91,768.20x = 137,433.60 × 91,768.20
4. Step 4: Simplify right side
   91,768.20x = 12,612,034,091.52
5. Step 5: Solve for x
   x = 12,612,034,091.52/91,768.20
6. Step 6: Final answer
   x = 137,433.60