Finding the Fourth Proportional to 9,784.70, 13,724.50 and 9,784.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,784.70 : 13,724.50 = 9,784.70 : x
2. Step 2: Convert to fraction form
   9,784.70/13,724.50 = 9,784.70/x
3. Step 3: Cross multiply
   9,784.70x = 13,724.50 × 9,784.70
4. Step 4: Simplify right side
   9,784.70x = 134,290,115.15
5. Step 5: Solve for x
   x = 134,290,115.15/9,784.70
6. Step 6: Final answer
   x = 13,724.50