Finding the Fourth Proportional to 31,820.88, 43,914.06 and 21,770.40

Step by Step Solution

1. Step 1: Write the proportion equation
   31,820.88 : 43,914.06 = 21,770.40 : x
2. Step 2: Convert to fraction form
   31,820.88/43,914.06 = 21,770.40/x
3. Step 3: Cross multiply
   31,820.88x = 43,914.06 × 21,770.40
4. Step 4: Simplify right side
   31,820.88x = 956,026,651.82
5. Step 5: Solve for x
   x = 956,026,651.82/31,820.88
6. Step 6: Final answer
   x = 30,044.00