Finding the Fourth Proportional to 118,887.32, 164,063.42 and 65,172.16

Step by Step Solution

1. Step 1: Write the proportion equation
   118,887.32 : 164,063.42 = 65,172.16 : x
2. Step 2: Convert to fraction form
   118,887.32/164,063.42 = 65,172.16/x
3. Step 3: Cross multiply
   118,887.32x = 164,063.42 × 65,172.16
4. Step 4: Simplify right side
   118,887.32x = 10,692,367,458.39
5. Step 5: Solve for x
   x = 10,692,367,458.39/118,887.32
6. Step 6: Final answer
   x = 89,936.99