Finding the Fourth Proportional to 118,778.78, 163,914.74 and 65,065.72

Step by Step Solution

1. Step 1: Write the proportion equation
   118,778.78 : 163,914.74 = 65,065.72 : x
2. Step 2: Convert to fraction form
   118,778.78/163,914.74 = 65,065.72/x
3. Step 3: Cross multiply
   118,778.78x = 163,914.74 × 65,065.72
4. Step 4: Simplify right side
   118,778.78x = 10,665,230,576.71
5. Step 5: Solve for x
   x = 10,665,230,576.71/118,778.78
6. Step 6: Final answer
   x = 89,790.71