Finding the Fourth Proportional to 104,978.28, 144,870.48 and 67,274.40

Step by Step Solution

1. Step 1: Write the proportion equation
   104,978.28 : 144,870.48 = 67,274.40 : x
2. Step 2: Convert to fraction form
   104,978.28/144,870.48 = 67,274.40/x
3. Step 3: Cross multiply
   104,978.28x = 144,870.48 × 67,274.40
4. Step 4: Simplify right side
   104,978.28x = 9,746,074,619.71
5. Step 5: Solve for x
   x = 9,746,074,619.71/104,978.28
6. Step 6: Final answer
   x = 92,838.96