Finding the Fourth Proportional to 85,667.16, 128,555.58 and 46,251.72

Step by Step Solution

1. Step 1: Write the proportion equation
   85,667.16 : 128,555.58 = 46,251.72 : x
2. Step 2: Convert to fraction form
   85,667.16/128,555.58 = 46,251.72/x
3. Step 3: Cross multiply
   85,667.16x = 128,555.58 × 46,251.72
4. Step 4: Simplify right side
   85,667.16x = 5,945,916,690.60
5. Step 5: Solve for x
   x = 5,945,916,690.60/85,667.16
6. Step 6: Final answer
   x = 69,407.19