Finding the Fourth Proportional to 139,659.05, 209,592.51 and 68,619.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139,659.05 : 209,592.51 = 68,619.82 : x
2. Step 2: Convert to fraction form
   139,659.05/209,592.51 = 68,619.82/x
3. Step 3: Cross multiply
   139,659.05x = 209,592.51 × 68,619.82
4. Step 4: Simplify right side
   139,659.05x = 14,382,200,309.55
5. Step 5: Solve for x
   x = 14,382,200,309.55/139,659.05
6. Step 6: Final answer
   x = 102,980.80