Finding the Fourth Proportional to 42,964.79, 64,420.71 and 14,878.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,964.79 : 64,420.71 = 14,878.31 : x
2. Step 2: Convert to fraction form
   42,964.79/64,420.71 = 14,878.31/x
3. Step 3: Cross multiply
   42,964.79x = 64,420.71 × 14,878.31
4. Step 4: Simplify right side
   42,964.79x = 958,471,293.80
5. Step 5: Solve for x
   x = 958,471,293.80/42,964.79
6. Step 6: Final answer
   x = 22,308.30