Finding the Fourth Proportional to 19,973.80, 27,572.72 and 12,903.72

Step by Step Solution

1. Step 1: Write the proportion equation
   19,973.80 : 27,572.72 = 12,903.72 : x
2. Step 2: Convert to fraction form
   19,973.80/27,572.72 = 12,903.72/x
3. Step 3: Cross multiply
   19,973.80x = 27,572.72 × 12,903.72
4. Step 4: Simplify right side
   19,973.80x = 355,790,658.52
5. Step 5: Solve for x
   x = 355,790,658.52/19,973.80
6. Step 6: Final answer
   x = 17,812.87