Finding the Fourth Proportional to 10,129.43, 15,199.59 and 4,935.30

Step by Step Solution

1. Step 1: Write the proportion equation
   10,129.43 : 15,199.59 = 4,935.30 : x
2. Step 2: Convert to fraction form
   10,129.43/15,199.59 = 4,935.30/x
3. Step 3: Cross multiply
   10,129.43x = 15,199.59 × 4,935.30
4. Step 4: Simplify right side
   10,129.43x = 75,014,536.53
5. Step 5: Solve for x
   x = 75,014,536.53/10,129.43
6. Step 6: Final answer
   x = 7,405.61