Finding the Fourth Proportional to 19,111.32, 28,652.40 and 10,800.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,111.32 : 28,652.40 = 10,800.72 : x
2. Step 2: Convert to fraction form
   19,111.32/28,652.40 = 10,800.72/x
3. Step 3: Cross multiply
   19,111.32x = 28,652.40 × 10,800.72
4. Step 4: Simplify right side
   19,111.32x = 309,466,549.73
5. Step 5: Solve for x
   x = 309,466,549.73/19,111.32
6. Step 6: Final answer
   x = 16,192.84