Finding the Fourth Proportional to 105,738.49, 145,926.84 and 60,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,738.49 : 145,926.84 = 60,415.50 : x
2. Step 2: Convert to fraction form
   105,738.49/145,926.84 = 60,415.50/x
3. Step 3: Cross multiply
   105,738.49x = 145,926.84 × 60,415.50
4. Step 4: Simplify right side
   105,738.49x = 8,816,243,002.02
5. Step 5: Solve for x
   x = 8,816,243,002.02/105,738.49
6. Step 6: Final answer
   x = 83,377.80