Finding the Fourth Proportional to 85,776.84, 128,621.39 and 35,843.31

Step by Step Solution

1. Step 1: Write the proportion equation
   85,776.84 : 128,621.39 = 35,843.31 : x
2. Step 2: Convert to fraction form
   85,776.84/128,621.39 = 35,843.31/x
3. Step 3: Cross multiply
   85,776.84x = 128,621.39 × 35,843.31
4. Step 4: Simplify right side
   85,776.84x = 4,610,216,175.18
5. Step 5: Solve for x
   x = 4,610,216,175.18/85,776.84
6. Step 6: Final answer
   x = 53,746.63