Finding the Fourth Proportional to 10,142.25, 15,218.73 and 7,199.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,142.25 : 15,218.73 = 7,199.70 : x
2. Step 2: Convert to fraction form
   10,142.25/15,218.73 = 7,199.70/x
3. Step 3: Cross multiply
   10,142.25x = 15,218.73 × 7,199.70
4. Step 4: Simplify right side
   10,142.25x = 109,570,178.29
5. Step 5: Solve for x
   x = 109,570,178.29/10,142.25
6. Step 6: Final answer
   x = 10,803.35