Finding the Fourth Proportional to 31,100.82, 43,042.47 and 30,354.63

Step by Step Solution

1. Step 1: Write the proportion equation
   31,100.82 : 43,042.47 = 30,354.63 : x
2. Step 2: Convert to fraction form
   31,100.82/43,042.47 = 30,354.63/x
3. Step 3: Cross multiply
   31,100.82x = 43,042.47 × 30,354.63
4. Step 4: Simplify right side
   31,100.82x = 1,306,538,251.14
5. Step 5: Solve for x
   x = 1,306,538,251.14/31,100.82
6. Step 6: Final answer
   x = 42,009.77