Finding the Fourth Proportional to 67,899.35, 101,853.58 and 17,978.80

Step by Step Solution

1. Step 1: Write the proportion equation
   67,899.35 : 101,853.58 = 17,978.80 : x
2. Step 2: Convert to fraction form
   67,899.35/101,853.58 = 17,978.80/x
3. Step 3: Cross multiply
   67,899.35x = 101,853.58 × 17,978.80
4. Step 4: Simplify right side
   67,899.35x = 1,831,205,144.10
5. Step 5: Solve for x
   x = 1,831,205,144.10/67,899.35
6. Step 6: Final answer
   x = 26,969.41