Finding the Fourth Proportional to 139,986.89, 209,980.49 and 34,805.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,986.89 : 209,980.49 = 34,805.87 : x
2. Step 2: Convert to fraction form
   139,986.89/209,980.49 = 34,805.87/x
3. Step 3: Cross multiply
   139,986.89x = 209,980.49 × 34,805.87
4. Step 4: Simplify right side
   139,986.89x = 7,308,553,637.48
5. Step 5: Solve for x
   x = 7,308,553,637.48/139,986.89
6. Step 6: Final answer
   x = 52,208.84