Finding the Fourth Proportional to 85,670.18, 128,364.83 and 60,665.33

Step by Step Solution

1. Step 1: Write the proportion equation
   85,670.18 : 128,364.83 = 60,665.33 : x
2. Step 2: Convert to fraction form
   85,670.18/128,364.83 = 60,665.33/x
3. Step 3: Cross multiply
   85,670.18x = 128,364.83 × 60,665.33
4. Step 4: Simplify right side
   85,670.18x = 7,787,294,485.78
5. Step 5: Solve for x
   x = 7,787,294,485.78/85,670.18
6. Step 6: Final answer
   x = 90,898.54