Finding the Fourth Proportional to 139,367.15, 209,050.73 and 60,479.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,367.15 : 209,050.73 = 60,479.63 : x
2. Step 2: Convert to fraction form
   139,367.15/209,050.73 = 60,479.63/x
3. Step 3: Cross multiply
   139,367.15x = 209,050.73 × 60,479.63
4. Step 4: Simplify right side
   139,367.15x = 12,643,309,453.98
5. Step 5: Solve for x
   x = 12,643,309,453.98/139,367.15
6. Step 6: Final answer
   x = 90,719.44