Finding the Fourth Proportional to 13,028.12, 17,978.76 and 7,059.95

Step by Step Solution

1. Step 1: Write the proportion equation
   13,028.12 : 17,978.76 = 7,059.95 : x
2. Step 2: Convert to fraction form
   13,028.12/17,978.76 = 7,059.95/x
3. Step 3: Cross multiply
   13,028.12x = 17,978.76 × 7,059.95
4. Step 4: Simplify right side
   13,028.12x = 126,929,056.77
5. Step 5: Solve for x
   x = 126,929,056.77/13,028.12
6. Step 6: Final answer
   x = 9,742.70