Finding the Fourth Proportional to 42,552.47, 63,838.18 and 12,972.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,552.47 : 63,838.18 = 12,972.61 : x
2. Step 2: Convert to fraction form
   42,552.47/63,838.18 = 12,972.61/x
3. Step 3: Cross multiply
   42,552.47x = 63,838.18 × 12,972.61
4. Step 4: Simplify right side
   42,552.47x = 828,147,620.22
5. Step 5: Solve for x
   x = 828,147,620.22/42,552.47
6. Step 6: Final answer
   x = 19,461.80