Finding the Fourth Proportional to 10,921.56, 16,384.91 and 3,130.17

Step by Step Solution

1. Step 1: Write the proportion equation
   10,921.56 : 16,384.91 = 3,130.17 : x
2. Step 2: Convert to fraction form
   10,921.56/16,384.91 = 3,130.17/x
3. Step 3: Cross multiply
   10,921.56x = 16,384.91 × 3,130.17
4. Step 4: Simplify right side
   10,921.56x = 51,287,538.08
5. Step 5: Solve for x
   x = 51,287,538.08/10,921.56
6. Step 6: Final answer
   x = 4,695.99