Finding the Fourth Proportional to 139,466.79, 209,082.63 and 60,521.56

Step by Step Solution

1. Step 1: Write the proportion equation
   139,466.79 : 209,082.63 = 60,521.56 : x
2. Step 2: Convert to fraction form
   139,466.79/209,082.63 = 60,521.56/x
3. Step 3: Cross multiply
   139,466.79x = 209,082.63 × 60,521.56
4. Step 4: Simplify right side
   139,466.79x = 12,654,006,936.50
5. Step 5: Solve for x
   x = 12,654,006,936.50/139,466.79
6. Step 6: Final answer
   x = 90,731.33