Finding the Fourth Proportional to 20,256.80, 30,366.72 and 7,101.99

Step by Step Solution

1. Step 1: Write the proportion equation
   20,256.80 : 30,366.72 = 7,101.99 : x
2. Step 2: Convert to fraction form
   20,256.80/30,366.72 = 7,101.99/x
3. Step 3: Cross multiply
   20,256.80x = 30,366.72 × 7,101.99
4. Step 4: Simplify right side
   20,256.80x = 215,664,141.77
5. Step 5: Solve for x
   x = 215,664,141.77/20,256.80
6. Step 6: Final answer
   x = 10,646.51