Finding the Fourth Proportional to 118,856.70, 164,021.49 and 65,145.06

Step by Step Solution

1. Step 1: Write the proportion equation
   118,856.70 : 164,021.49 = 65,145.06 : x
2. Step 2: Convert to fraction form
   118,856.70/164,021.49 = 65,145.06/x
3. Step 3: Cross multiply
   118,856.70x = 164,021.49 × 65,145.06
4. Step 4: Simplify right side
   118,856.70x = 10,685,189,807.34
5. Step 5: Solve for x
   x = 10,685,189,807.34/118,856.70
6. Step 6: Final answer
   x = 89,899.77