Finding the Fourth Proportional to 42,789.64, 64,168.48 and 14,701.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,789.64 : 64,168.48 = 14,701.72 : x
2. Step 2: Convert to fraction form
   42,789.64/64,168.48 = 14,701.72/x
3. Step 3: Cross multiply
   42,789.64x = 64,168.48 × 14,701.72
4. Step 4: Simplify right side
   42,789.64x = 943,387,025.79
5. Step 5: Solve for x
   x = 943,387,025.79/42,789.64
6. Step 6: Final answer
   x = 22,047.09