Finding the Fourth Proportional to 105,048.45, 144,792.63 and 74,381.31

Step by Step Solution

1. Step 1: Write the proportion equation
   105,048.45 : 144,792.63 = 74,381.31 : x
2. Step 2: Convert to fraction form
   105,048.45/144,792.63 = 74,381.31/x
3. Step 3: Cross multiply
   105,048.45x = 144,792.63 × 74,381.31
4. Step 4: Simplify right side
   105,048.45x = 10,769,865,497.75
5. Step 5: Solve for x
   x = 10,769,865,497.75/105,048.45
6. Step 6: Final answer
   x = 102,522.84