Finding the Fourth Proportional to 42,552.72, 63,838.55 and 12,972.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,552.72 : 63,838.55 = 12,972.86 : x
2. Step 2: Convert to fraction form
   42,552.72/63,838.55 = 12,972.86/x
3. Step 3: Cross multiply
   42,552.72x = 63,838.55 × 12,972.86
4. Step 4: Simplify right side
   42,552.72x = 828,168,571.75
5. Step 5: Solve for x
   x = 828,168,571.75/42,552.72
6. Step 6: Final answer
   x = 19,462.18