Finding the Fourth Proportional to 105,333.48, 145,363.68 and 57,588.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,333.48 : 145,363.68 = 57,588.12 : x
2. Step 2: Convert to fraction form
   105,333.48/145,363.68 = 57,588.12/x
3. Step 3: Cross multiply
   105,333.48x = 145,363.68 × 57,588.12
4. Step 4: Simplify right side
   105,333.48x = 8,371,221,047.48
5. Step 5: Solve for x
   x = 8,371,221,047.48/105,333.48
6. Step 6: Final answer
   x = 79,473.51