Finding the Fourth Proportional to 139,311.63, 208,843.52 and 60,382.80

Step by Step Solution

1. Step 1: Write the proportion equation
   139,311.63 : 208,843.52 = 60,382.80 : x
2. Step 2: Convert to fraction form
   139,311.63/208,843.52 = 60,382.80/x
3. Step 3: Cross multiply
   139,311.63x = 208,843.52 × 60,382.80
4. Step 4: Simplify right side
   139,311.63x = 12,610,556,197.54
5. Step 5: Solve for x
   x = 12,610,556,197.54/139,311.63
6. Step 6: Final answer
   x = 90,520.48