Finding the Fourth Proportional to 139,415.14, 209,005.17 and 60,469.93

Step by Step Solution

1. Step 1: Write the proportion equation
   139,415.14 : 209,005.17 = 60,469.93 : x
2. Step 2: Convert to fraction form
   139,415.14/209,005.17 = 60,469.93/x
3. Step 3: Cross multiply
   139,415.14x = 209,005.17 × 60,469.93
4. Step 4: Simplify right side
   139,415.14x = 12,638,527,999.54
5. Step 5: Solve for x
   x = 12,638,527,999.54/139,415.14
6. Step 6: Final answer
   x = 90,653.91