Finding the Fourth Proportional to 118,881.28, 164,053.76 and 65,889.28

Step by Step Solution

1. Step 1: Write the proportion equation
   118,881.28 : 164,053.76 = 65,889.28 : x
2. Step 2: Convert to fraction form
   118,881.28/164,053.76 = 65,889.28/x
3. Step 3: Cross multiply
   118,881.28x = 164,053.76 × 65,889.28
4. Step 4: Simplify right side
   118,881.28x = 10,809,384,127.69
5. Step 5: Solve for x
   x = 10,809,384,127.69/118,881.28
6. Step 6: Final answer
   x = 90,925.87