Finding the Fourth Proportional to 118,892.61, 164,072.97 and 65,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,892.61 : 164,072.97 = 65,178.72 : x
2. Step 2: Convert to fraction form
   118,892.61/164,072.97 = 65,178.72/x
3. Step 3: Cross multiply
   118,892.61x = 164,072.97 × 65,178.72
4. Step 4: Simplify right side
   118,892.61x = 10,694,066,171.20
5. Step 5: Solve for x
   x = 10,694,066,171.20/118,892.61
6. Step 6: Final answer
   x = 89,947.27