Finding the Fourth Proportional to 139,990.18, 209,986.06 and 34,809.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,990.18 : 209,986.06 = 34,809.16 : x
2. Step 2: Convert to fraction form
   139,990.18/209,986.06 = 34,809.16/x
3. Step 3: Cross multiply
   139,990.18x = 209,986.06 × 34,809.16
4. Step 4: Simplify right side
   139,990.18x = 7,309,438,360.31
5. Step 5: Solve for x
   x = 7,309,438,360.31/139,990.18
6. Step 6: Final answer
   x = 52,213.94