Finding the Fourth Proportional to 10,978.25, 15,145.85 and 7,203.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,978.25 : 15,145.85 = 7,203.50 : x
2. Step 2: Convert to fraction form
   10,978.25/15,145.85 = 7,203.50/x
3. Step 3: Cross multiply
   10,978.25x = 15,145.85 × 7,203.50
4. Step 4: Simplify right side
   10,978.25x = 109,103,130.48
5. Step 5: Solve for x
   x = 109,103,130.48/10,978.25
6. Step 6: Final answer
   x = 9,938.12