Finding the Fourth Proportional to 31,554.67, 43,456.86 and 30,865.77

Step by Step Solution

1. Step 1: Write the proportion equation
   31,554.67 : 43,456.86 = 30,865.77 : x
2. Step 2: Convert to fraction form
   31,554.67/43,456.86 = 30,865.77/x
3. Step 3: Cross multiply
   31,554.67x = 43,456.86 × 30,865.77
4. Step 4: Simplify right side
   31,554.67x = 1,341,329,228.40
5. Step 5: Solve for x
   x = 1,341,329,228.40/31,554.67
6. Step 6: Final answer
   x = 42,508.11