Finding the Fourth Proportional to 28,516.83, 42,751.25 and 12,930.27

Step by Step Solution

1. Step 1: Write the proportion equation
   28,516.83 : 42,751.25 = 12,930.27 : x
2. Step 2: Convert to fraction form
   28,516.83/42,751.25 = 12,930.27/x
3. Step 3: Cross multiply
   28,516.83x = 42,751.25 × 12,930.27
4. Step 4: Simplify right side
   28,516.83x = 552,785,140.69
5. Step 5: Solve for x
   x = 552,785,140.69/28,516.83
6. Step 6: Final answer
   x = 19,384.52