Finding the Fourth Proportional to 139,552.47, 209,120.94 and 60,623.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,552.47 : 209,120.94 = 60,623.64 : x
2. Step 2: Convert to fraction form
   139,552.47/209,120.94 = 60,623.64/x
3. Step 3: Cross multiply
   139,552.47x = 209,120.94 × 60,623.64
4. Step 4: Simplify right side
   139,552.47x = 12,677,672,583.02
5. Step 5: Solve for x
   x = 12,677,672,583.02/139,552.47
6. Step 6: Final answer
   x = 90,845.20