Finding the Fourth Proportional to 11,430.84, 15,765.83 and 9,840.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,430.84 : 15,765.83 = 9,840.10 : x
2. Step 2: Convert to fraction form
   11,430.84/15,765.83 = 9,840.10/x
3. Step 3: Cross multiply
   11,430.84x = 15,765.83 × 9,840.10
4. Step 4: Simplify right side
   11,430.84x = 155,137,343.78
5. Step 5: Solve for x
   x = 155,137,343.78/11,430.84
6. Step 6: Final answer
   x = 13,571.82