Finding the Fourth Proportional to 42,847.52, 64,256.22 and 12,852.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,847.52 : 64,256.22 = 12,852.81 : x
2. Step 2: Convert to fraction form
   42,847.52/64,256.22 = 12,852.81/x
3. Step 3: Cross multiply
   42,847.52x = 64,256.22 × 12,852.81
4. Step 4: Simplify right side
   42,847.52x = 825,872,986.98
5. Step 5: Solve for x
   x = 825,872,986.98/42,847.52
6. Step 6: Final answer
   x = 19,274.70