Finding the Fourth Proportional to 85,443.30, 128,092.24 and 52,186.69

Step by Step Solution

1. Step 1: Write the proportion equation
   85,443.30 : 128,092.24 = 52,186.69 : x
2. Step 2: Convert to fraction form
   85,443.30/128,092.24 = 52,186.69/x
3. Step 3: Cross multiply
   85,443.30x = 128,092.24 × 52,186.69
4. Step 4: Simplify right side
   85,443.30x = 6,684,710,020.29
5. Step 5: Solve for x
   x = 6,684,710,020.29/85,443.30
6. Step 6: Final answer
   x = 78,235.63