Finding the Fourth Proportional to 105,241.51, 145,231 and 57,495.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,241.51 : 145,231 = 57,495.12 : x
2. Step 2: Convert to fraction form
   105,241.51/145,231 = 57,495.12/x
3. Step 3: Cross multiply
   105,241.51x = 145,231 × 57,495.12
4. Step 4: Simplify right side
   105,241.51x = 8,350,073,772.72
5. Step 5: Solve for x
   x = 8,350,073,772.72/105,241.51
6. Step 6: Final answer
   x = 79,342.02