Finding the Fourth Proportional to 71,112.58, 106,668.83 and 21,191.40

Step by Step Solution

1. Step 1: Write the proportion equation
   71,112.58 : 106,668.83 = 21,191.40 : x
2. Step 2: Convert to fraction form
   71,112.58/106,668.83 = 21,191.40/x
3. Step 3: Cross multiply
   71,112.58x = 106,668.83 × 21,191.40
4. Step 4: Simplify right side
   71,112.58x = 2,260,461,897.04
5. Step 5: Solve for x
   x = 2,260,461,897.04/71,112.58
6. Step 6: Final answer
   x = 31,787.09