Finding the Fourth Proportional to 79,725.81, 109,901.43 and 65,554.05

Step by Step Solution

1. Step 1: Write the proportion equation
   79,725.81 : 109,901.43 = 65,554.05 : x
2. Step 2: Convert to fraction form
   79,725.81/109,901.43 = 65,554.05/x
3. Step 3: Cross multiply
   79,725.81x = 109,901.43 × 65,554.05
4. Step 4: Simplify right side
   79,725.81x = 7,204,483,837.29
5. Step 5: Solve for x
   x = 7,204,483,837.29/79,725.81
6. Step 6: Final answer
   x = 90,365.77