Finding the Fourth Proportional to 85,667.64, 128,432.18 and 35,785.94

Step by Step Solution

1. Step 1: Write the proportion equation
   85,667.64 : 128,432.18 = 35,785.94 : x
2. Step 2: Convert to fraction form
   85,667.64/128,432.18 = 35,785.94/x
3. Step 3: Cross multiply
   85,667.64x = 128,432.18 × 35,785.94
4. Step 4: Simplify right side
   85,667.64x = 4,596,066,287.55
5. Step 5: Solve for x
   x = 4,596,066,287.55/85,667.64
6. Step 6: Final answer
   x = 53,649.97