Finding the Fourth Proportional to 118,859.07, 164,025.50 and 65,145.81

Step by Step Solution

1. Step 1: Write the proportion equation
   118,859.07 : 164,025.50 = 65,145.81 : x
2. Step 2: Convert to fraction form
   118,859.07/164,025.50 = 65,145.81/x
3. Step 3: Cross multiply
   118,859.07x = 164,025.50 × 65,145.81
4. Step 4: Simplify right side
   118,859.07x = 10,685,573,732.43
5. Step 5: Solve for x
   x = 10,685,573,732.43/118,859.07
6. Step 6: Final answer
   x = 89,901.21