Finding the Fourth Proportional to 42,839.86, 64,288.86 and 15,137.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42,839.86 : 64,288.86 = 15,137.86 : x
2. Step 2: Convert to fraction form
   42,839.86/64,288.86 = 15,137.86/x
3. Step 3: Cross multiply
   42,839.86x = 64,288.86 × 15,137.86
4. Step 4: Simplify right side
   42,839.86x = 973,195,762.24
5. Step 5: Solve for x
   x = 973,195,762.24/42,839.86
6. Step 6: Final answer
   x = 22,717.06