Finding the Fourth Proportional to 105,092.82, 145,031.59 and 57,348.79

Step by Step Solution

1. Step 1: Write the proportion equation
   105,092.82 : 145,031.59 = 57,348.79 : x
2. Step 2: Convert to fraction form
   105,092.82/145,031.59 = 57,348.79/x
3. Step 3: Cross multiply
   105,092.82x = 145,031.59 × 57,348.79
4. Step 4: Simplify right side
   105,092.82x = 8,317,385,692.33
5. Step 5: Solve for x
   x = 8,317,385,692.33/105,092.82
6. Step 6: Final answer
   x = 79,143.23