Finding the Fourth Proportional to 139,986.17, 209,980.05 and 34,805.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,986.17 : 209,980.05 = 34,805.15 : x
2. Step 2: Convert to fraction form
   139,986.17/209,980.05 = 34,805.15/x
3. Step 3: Cross multiply
   139,986.17x = 209,980.05 × 34,805.15
4. Step 4: Simplify right side
   139,986.17x = 7,308,387,137.26
5. Step 5: Solve for x
   x = 7,308,387,137.26/139,986.17
6. Step 6: Final answer
   x = 52,207.92