Finding the Fourth Proportional to 56,171.27, 77,516.34 and 31,020.77

Step by Step Solution

1. Step 1: Write the proportion equation
   56,171.27 : 77,516.34 = 31,020.77 : x
2. Step 2: Convert to fraction form
   56,171.27/77,516.34 = 31,020.77/x
3. Step 3: Cross multiply
   56,171.27x = 77,516.34 × 31,020.77
4. Step 4: Simplify right side
   56,171.27x = 2,404,616,554.38
5. Step 5: Solve for x
   x = 2,404,616,554.38/56,171.27
6. Step 6: Final answer
   x = 42,808.66