Finding the Fourth Proportional to 139,700.24, 209,545.20 and 60,814.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,700.24 : 209,545.20 = 60,814.64 : x
2. Step 2: Convert to fraction form
   139,700.24/209,545.20 = 60,814.64/x
3. Step 3: Cross multiply
   139,700.24x = 209,545.20 × 60,814.64
4. Step 4: Simplify right side
   139,700.24x = 12,743,415,901.73
5. Step 5: Solve for x
   x = 12,743,415,901.73/139,700.24
6. Step 6: Final answer
   x = 91,219.71