Finding the Fourth Proportional to 83,535.90, 125,595.45 and 81,786.30

Step by Step Solution

1. Step 1: Write the proportion equation
   83,535.90 : 125,595.45 = 81,786.30 : x
2. Step 2: Convert to fraction form
   83,535.90/125,595.45 = 81,786.30/x
3. Step 3: Cross multiply
   83,535.90x = 125,595.45 × 81,786.30
4. Step 4: Simplify right side
   83,535.90x = 10,271,987,152.34
5. Step 5: Solve for x
   x = 10,271,987,152.34/83,535.90
6. Step 6: Final answer
   x = 122,964.94