Finding the Fourth Proportional to 42,868.66, 64,271.83 and 17,915.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,868.66 : 64,271.83 = 17,915.84 : x
2. Step 2: Convert to fraction form
   42,868.66/64,271.83 = 17,915.84/x
3. Step 3: Cross multiply
   42,868.66x = 64,271.83 × 17,915.84
4. Step 4: Simplify right side
   42,868.66x = 1,151,483,822.79
5. Step 5: Solve for x
   x = 1,151,483,822.79/42,868.66
6. Step 6: Final answer
   x = 26,860.74