Finding the Fourth Proportional to 28,340.46, 42,472.35 and 10,800.72

Step by Step Solution

1. Step 1: Write the proportion equation
   28,340.46 : 42,472.35 = 10,800.72 : x
2. Step 2: Convert to fraction form
   28,340.46/42,472.35 = 10,800.72/x
3. Step 3: Cross multiply
   28,340.46x = 42,472.35 × 10,800.72
4. Step 4: Simplify right side
   28,340.46x = 458,731,960.09
5. Step 5: Solve for x
   x = 458,731,960.09/28,340.46
6. Step 6: Final answer
   x = 16,186.47