Finding the Fourth Proportional to 139,365.15, 209,047.72 and 60,477.63

Step by Step Solution

1. Step 1: Write the proportion equation
   139,365.15 : 209,047.72 = 60,477.63 : x
2. Step 2: Convert to fraction form
   139,365.15/209,047.72 = 60,477.63/x
3. Step 3: Cross multiply
   139,365.15x = 209,047.72 × 60,477.63
4. Step 4: Simplify right side
   139,365.15x = 12,642,710,662.50
5. Step 5: Solve for x
   x = 12,642,710,662.50/139,365.15
6. Step 6: Final answer
   x = 90,716.44