Finding the Fourth Proportional to 17,915.84, 26,870.72 and 4,769.60

Step by Step Solution

1. Step 1: Write the proportion equation
   17,915.84 : 26,870.72 = 4,769.60 : x
2. Step 2: Convert to fraction form
   17,915.84/26,870.72 = 4,769.60/x
3. Step 3: Cross multiply
   17,915.84x = 26,870.72 × 4,769.60
4. Step 4: Simplify right side
   17,915.84x = 128,162,586.11
5. Step 5: Solve for x
   x = 128,162,586.11/17,915.84
6. Step 6: Final answer
   x = 7,153.59