Finding the Fourth Proportional to 7,200.35, 10,109.65 and 7,200.35

Step by Step Solution

1. Step 1: Write the proportion equation
   7,200.35 : 10,109.65 = 7,200.35 : x
2. Step 2: Convert to fraction form
   7,200.35/10,109.65 = 7,200.35/x
3. Step 3: Cross multiply
   7,200.35x = 10,109.65 × 7,200.35
4. Step 4: Simplify right side
   7,200.35x = 72,793,018.38
5. Step 5: Solve for x
   x = 72,793,018.38/7,200.35
6. Step 6: Final answer
   x = 10,109.65