Finding the Fourth Proportional to 139,659.59, 209,489.82 and 34,478.57

Step by Step Solution

1. Step 1: Write the proportion equation
   139,659.59 : 209,489.82 = 34,478.57 : x
2. Step 2: Convert to fraction form
   139,659.59/209,489.82 = 34,478.57/x
3. Step 3: Cross multiply
   139,659.59x = 209,489.82 × 34,478.57
4. Step 4: Simplify right side
   139,659.59x = 7,222,909,423.16
5. Step 5: Solve for x
   x = 7,222,909,423.16/139,659.59
6. Step 6: Final answer
   x = 51,717.96