Finding the Fourth Proportional to 10,131.59, 15,202.73 and 7,189.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,131.59 : 15,202.73 = 7,189.05 : x
2. Step 2: Convert to fraction form
   10,131.59/15,202.73 = 7,189.05/x
3. Step 3: Cross multiply
   10,131.59x = 15,202.73 × 7,189.05
4. Step 4: Simplify right side
   10,131.59x = 109,293,186.11
5. Step 5: Solve for x
   x = 109,293,186.11/10,131.59
6. Step 6: Final answer
   x = 10,787.37