Finding the Fourth Proportional to 118,902.63, 164,086.16 and 65,188.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,902.63 : 164,086.16 = 65,188.50 : x
2. Step 2: Convert to fraction form
   118,902.63/164,086.16 = 65,188.50/x
3. Step 3: Cross multiply
   118,902.63x = 164,086.16 × 65,188.50
4. Step 4: Simplify right side
   118,902.63x = 10,696,529,699.89
5. Step 5: Solve for x
   x = 10,696,529,699.89/118,902.63
6. Step 6: Final answer
   x = 89,960.41