Finding the Fourth Proportional to 139,336.77, 209,001.51 and 49,378.17

Step by Step Solution

1. Step 1: Write the proportion equation
   139,336.77 : 209,001.51 = 49,378.17 : x
2. Step 2: Convert to fraction form
   139,336.77/209,001.51 = 49,378.17/x
3. Step 3: Cross multiply
   139,336.77x = 209,001.51 × 49,378.17
4. Step 4: Simplify right side
   139,336.77x = 10,320,112,091.04
5. Step 5: Solve for x
   x = 10,320,112,091.04/139,336.77
6. Step 6: Final answer
   x = 74,065.96