Finding the Fourth Proportional to 42,698.84, 64,079.72 and 20,525

Step by Step Solution

1. Step 1: Write the proportion equation
   42,698.84 : 64,079.72 = 20,525 : x
2. Step 2: Convert to fraction form
   42,698.84/64,079.72 = 20,525/x
3. Step 3: Cross multiply
   42,698.84x = 64,079.72 × 20,525
4. Step 4: Simplify right side
   42,698.84x = 1,315,236,253
5. Step 5: Solve for x
   x = 1,315,236,253/42,698.84
6. Step 6: Final answer
   x = 30,802.62