Finding the Fourth Proportional to 85,378.52, 128,056.82 and 26,209.24

Step by Step Solution

1. Step 1: Write the proportion equation
   85,378.52 : 128,056.82 = 26,209.24 : x
2. Step 2: Convert to fraction form
   85,378.52/128,056.82 = 26,209.24/x
3. Step 3: Cross multiply
   85,378.52x = 128,056.82 × 26,209.24
4. Step 4: Simplify right side
   85,378.52x = 3,356,271,477.83
5. Step 5: Solve for x
   x = 3,356,271,477.83/85,378.52
6. Step 6: Final answer
   x = 39,310.49