Finding the Fourth Proportional to 42,530.48, 63,805.27 and 12,950.65

Step by Step Solution

1. Step 1: Write the proportion equation
   42,530.48 : 63,805.27 = 12,950.65 : x
2. Step 2: Convert to fraction form
   42,530.48/63,805.27 = 12,950.65/x
3. Step 3: Cross multiply
   42,530.48x = 63,805.27 × 12,950.65
4. Step 4: Simplify right side
   42,530.48x = 826,319,791.59
5. Step 5: Solve for x
   x = 826,319,791.59/42,530.48
6. Step 6: Final answer
   x = 19,428.88