Finding the Fourth Proportional to 85,672.18, 128,367.82 and 60,667.32

Step by Step Solution

1. Step 1: Write the proportion equation
   85,672.18 : 128,367.82 = 60,667.32 : x
2. Step 2: Convert to fraction form
   85,672.18/128,367.82 = 60,667.32/x
3. Step 3: Cross multiply
   85,672.18x = 128,367.82 × 60,667.32
4. Step 4: Simplify right side
   85,672.18x = 7,787,731,613.64
5. Step 5: Solve for x
   x = 7,787,731,613.64/85,672.18
6. Step 6: Final answer
   x = 90,901.52