Finding the Fourth Proportional to 31,553.01, 43,454.55 and 30,864.10

Step by Step Solution

1. Step 1: Write the proportion equation
   31,553.01 : 43,454.55 = 30,864.10 : x
2. Step 2: Convert to fraction form
   31,553.01/43,454.55 = 30,864.10/x
3. Step 3: Cross multiply
   31,553.01x = 43,454.55 × 30,864.10
4. Step 4: Simplify right side
   31,553.01x = 1,341,185,576.66
5. Step 5: Solve for x
   x = 1,341,185,576.66/31,553.01
6. Step 6: Final answer
   x = 42,505.79