Finding the Fourth Proportional to 79,706.81, 109,875.21 and 65,535.05

Step by Step Solution

1. Step 1: Write the proportion equation
   79,706.81 : 109,875.21 = 65,535.05 : x
2. Step 2: Convert to fraction form
   79,706.81/109,875.21 = 65,535.05/x
3. Step 3: Cross multiply
   79,706.81x = 109,875.21 × 65,535.05
4. Step 4: Simplify right side
   79,706.81x = 7,200,677,381.11
5. Step 5: Solve for x
   x = 7,200,677,381.11/79,706.81
6. Step 6: Final answer
   x = 90,339.55