Finding the Fourth Proportional to 71,196.83, 106,816.67 and 21,278.55

Step by Step Solution

1. Step 1: Write the proportion equation
   71,196.83 : 106,816.67 = 21,278.55 : x
2. Step 2: Convert to fraction form
   71,196.83/106,816.67 = 21,278.55/x
3. Step 3: Cross multiply
   71,196.83x = 106,816.67 × 21,278.55
4. Step 4: Simplify right side
   71,196.83x = 2,272,903,747.04
5. Step 5: Solve for x
   x = 2,272,903,747.04/71,196.83
6. Step 6: Final answer
   x = 31,924.23