Finding the Fourth Proportional to 31,401.84, 43,282.50 and 30,570.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,401.84 : 43,282.50 = 30,570.84 : x
2. Step 2: Convert to fraction form
   31,401.84/43,282.50 = 30,570.84/x
3. Step 3: Cross multiply
   31,401.84x = 43,282.50 × 30,570.84
4. Step 4: Simplify right side
   31,401.84x = 1,323,182,382.30
5. Step 5: Solve for x
   x = 1,323,182,382.30/31,401.84
6. Step 6: Final answer
   x = 42,137.10