Finding the Fourth Proportional to 85,847.30, 128,809.35 and 39,076.10

Step by Step Solution

1. Step 1: Write the proportion equation
   85,847.30 : 128,809.35 = 39,076.10 : x
2. Step 2: Convert to fraction form
   85,847.30/128,809.35 = 39,076.10/x
3. Step 3: Cross multiply
   85,847.30x = 128,809.35 × 39,076.10
4. Step 4: Simplify right side
   85,847.30x = 5,033,367,041.54
5. Step 5: Solve for x
   x = 5,033,367,041.54/85,847.30
6. Step 6: Final answer
   x = 58,631.63