Finding the Fourth Proportional to 120,577.49, 180,819.89 and 57,348.89

Step by Step Solution

1. Step 1: Write the proportion equation
   120,577.49 : 180,819.89 = 57,348.89 : x
2. Step 2: Convert to fraction form
   120,577.49/180,819.89 = 57,348.89/x
3. Step 3: Cross multiply
   120,577.49x = 180,819.89 × 57,348.89
4. Step 4: Simplify right side
   120,577.49x = 10,369,819,981.42
5. Step 5: Solve for x
   x = 10,369,819,981.42/120,577.49
6. Step 6: Final answer
   x = 86,001.29