Finding the Fourth Proportional to 42,869.42, 64,308.42 and 14,785.78

Step by Step Solution

1. Step 1: Write the proportion equation
   42,869.42 : 64,308.42 = 14,785.78 : x
2. Step 2: Convert to fraction form
   42,869.42/64,308.42 = 14,785.78/x
3. Step 3: Cross multiply
   42,869.42x = 64,308.42 × 14,785.78
4. Step 4: Simplify right side
   42,869.42x = 950,850,150.27
5. Step 5: Solve for x
   x = 950,850,150.27/42,869.42
6. Step 6: Final answer
   x = 22,180.15