Finding the Fourth Proportional to 42,943.88, 64,402.86 and 25,409

Step by Step Solution

1. Step 1: Write the proportion equation
   42,943.88 : 64,402.86 = 25,409 : x
2. Step 2: Convert to fraction form
   42,943.88/64,402.86 = 25,409/x
3. Step 3: Cross multiply
   42,943.88x = 64,402.86 × 25,409
4. Step 4: Simplify right side
   42,943.88x = 1,636,412,269.74
5. Step 5: Solve for x
   x = 1,636,412,269.74/42,943.88
6. Step 6: Final answer
   x = 38,105.83