Finding the Fourth Proportional to 42,725.15, 64,080.82 and 14,644.07

Step by Step Solution

1. Step 1: Write the proportion equation
   42,725.15 : 64,080.82 = 14,644.07 : x
2. Step 2: Convert to fraction form
   42,725.15/64,080.82 = 14,644.07/x
3. Step 3: Cross multiply
   42,725.15x = 64,080.82 × 14,644.07
4. Step 4: Simplify right side
   42,725.15x = 938,404,013.74
5. Step 5: Solve for x
   x = 938,404,013.74/42,725.15
6. Step 6: Final answer
   x = 21,963.74