Finding the Fourth Proportional to 139,914.60, 209,757.54 and 65,081.40

Step by Step Solution

1. Step 1: Write the proportion equation
   139,914.60 : 209,757.54 = 65,081.40 : x
2. Step 2: Convert to fraction form
   139,914.60/209,757.54 = 65,081.40/x
3. Step 3: Cross multiply
   139,914.60x = 209,757.54 × 65,081.40
4. Step 4: Simplify right side
   139,914.60x = 13,651,314,363.76
5. Step 5: Solve for x
   x = 13,651,314,363.76/139,914.60
6. Step 6: Final answer
   x = 97,568.91