Finding the Fourth Proportional to 85,362.48, 128,109.06 and 38,648.16

Step by Step Solution

1. Step 1: Write the proportion equation
   85,362.48 : 128,109.06 = 38,648.16 : x
2. Step 2: Convert to fraction form
   85,362.48/128,109.06 = 38,648.16/x
3. Step 3: Cross multiply
   85,362.48x = 128,109.06 × 38,648.16
4. Step 4: Simplify right side
   85,362.48x = 4,951,179,448.33
5. Step 5: Solve for x
   x = 4,951,179,448.33/85,362.48
6. Step 6: Final answer
   x = 58,001.82