Finding the Fourth Proportional to 84,498.45, 126,747.33 and 21,318.72

Step by Step Solution

1. Step 1: Write the proportion equation
   84,498.45 : 126,747.33 = 21,318.72 : x
2. Step 2: Convert to fraction form
   84,498.45/126,747.33 = 21,318.72/x
3. Step 3: Cross multiply
   84,498.45x = 126,747.33 × 21,318.72
4. Step 4: Simplify right side
   84,498.45x = 2,702,090,839.02
5. Step 5: Solve for x
   x = 2,702,090,839.02/84,498.45
6. Step 6: Final answer
   x = 31,977.99