Finding the Fourth Proportional to 139,704.24, 209,551.20 and 60,818.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,704.24 : 209,551.20 = 60,818.64 : x
2. Step 2: Convert to fraction form
   139,704.24/209,551.20 = 60,818.64/x
3. Step 3: Cross multiply
   139,704.24x = 209,551.20 × 60,818.64
4. Step 4: Simplify right side
   139,704.24x = 12,744,618,994.37
5. Step 5: Solve for x
   x = 12,744,618,994.37/139,704.24
6. Step 6: Final answer
   x = 91,225.71