Finding the Fourth Proportional to 85,705.82, 128,594.61 and 37,649.64

Step by Step Solution

1. Step 1: Write the proportion equation
   85,705.82 : 128,594.61 = 37,649.64 : x
2. Step 2: Convert to fraction form
   85,705.82/128,594.61 = 37,649.64/x
3. Step 3: Cross multiply
   85,705.82x = 128,594.61 × 37,649.64
4. Step 4: Simplify right side
   85,705.82x = 4,841,540,356.83
5. Step 5: Solve for x
   x = 4,841,540,356.83/85,705.82
6. Step 6: Final answer
   x = 56,490.22