Finding the Fourth Proportional to 42,713.92, 64,025.25 and 21,669.45

Step by Step Solution

1. Step 1: Write the proportion equation
   42,713.92 : 64,025.25 = 21,669.45 : x
2. Step 2: Convert to fraction form
   42,713.92/64,025.25 = 21,669.45/x
3. Step 3: Cross multiply
   42,713.92x = 64,025.25 × 21,669.45
4. Step 4: Simplify right side
   42,713.92x = 1,387,391,953.61
5. Step 5: Solve for x
   x = 1,387,391,953.61/42,713.92
6. Step 6: Final answer
   x = 32,481.03