Finding the Fourth Proportional to 105,294.04, 145,308.10 and 57,550.48

Step by Step Solution

1. Step 1: Write the proportion equation
   105,294.04 : 145,308.10 = 57,550.48 : x
2. Step 2: Convert to fraction form
   105,294.04/145,308.10 = 57,550.48/x
3. Step 3: Cross multiply
   105,294.04x = 145,308.10 × 57,550.48
4. Step 4: Simplify right side
   105,294.04x = 8,362,550,902.89
5. Step 5: Solve for x
   x = 8,362,550,902.89/105,294.04
6. Step 6: Final answer
   x = 79,420.93