Finding the Fourth Proportional to 26,915.32, 37,139.16 and 14,978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   26,915.32 : 37,139.16 = 14,978.80 : x
2. Step 2: Convert to fraction form
   26,915.32/37,139.16 = 14,978.80/x
3. Step 3: Cross multiply
   26,915.32x = 37,139.16 × 14,978.80
4. Step 4: Simplify right side
   26,915.32x = 556,300,049.81
5. Step 5: Solve for x
   x = 556,300,049.81/26,915.32
6. Step 6: Final answer
   x = 20,668.53