Finding the Fourth Proportional to 114,939.81, 158,615.42 and 64,638.81

Step by Step Solution

1. Step 1: Write the proportion equation
   114,939.81 : 158,615.42 = 64,638.81 : x
2. Step 2: Convert to fraction form
   114,939.81/158,615.42 = 64,638.81/x
3. Step 3: Cross multiply
   114,939.81x = 158,615.42 × 64,638.81
4. Step 4: Simplify right side
   114,939.81x = 10,252,711,673.26
5. Step 5: Solve for x
   x = 10,252,711,673.26/114,939.81
6. Step 6: Final answer
   x = 89,200.70