Finding the Fourth Proportional to 72,484.17, 108,721.40 and 19,889.25

Step by Step Solution

1. Step 1: Write the proportion equation
   72,484.17 : 108,721.40 = 19,889.25 : x
2. Step 2: Convert to fraction form
   72,484.17/108,721.40 = 19,889.25/x
3. Step 3: Cross multiply
   72,484.17x = 108,721.40 × 19,889.25
4. Step 4: Simplify right side
   72,484.17x = 2,162,387,005.50
5. Step 5: Solve for x
   x = 2,162,387,005.50/72,484.17
6. Step 6: Final answer
   x = 29,832.54