Finding the Fourth Proportional to 42,560.64, 63,843.39 and 12,980.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42,560.64 : 63,843.39 = 12,980.52 : x
2. Step 2: Convert to fraction form
   42,560.64/63,843.39 = 12,980.52/x
3. Step 3: Cross multiply
   42,560.64x = 63,843.39 × 12,980.52
4. Step 4: Simplify right side
   42,560.64x = 828,720,400.76
5. Step 5: Solve for x
   x = 828,720,400.76/42,560.64
6. Step 6: Final answer
   x = 19,471.52