Finding the Fourth Proportional to 10,390.05, 15,580.03 and 4,842.09

Step by Step Solution

1. Step 1: Write the proportion equation
   10,390.05 : 15,580.03 = 4,842.09 : x
2. Step 2: Convert to fraction form
   10,390.05/15,580.03 = 4,842.09/x
3. Step 3: Cross multiply
   10,390.05x = 15,580.03 × 4,842.09
4. Step 4: Simplify right side
   10,390.05x = 75,439,907.46
5. Step 5: Solve for x
   x = 75,439,907.46/10,390.05
6. Step 6: Final answer
   x = 7,260.78