Finding the Fourth Proportional to 72,298.31, 108,444.27 and 19,707.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,298.31 : 108,444.27 = 19,707.79 : x
2. Step 2: Convert to fraction form
   72,298.31/108,444.27 = 19,707.79/x
3. Step 3: Cross multiply
   72,298.31x = 108,444.27 × 19,707.79
4. Step 4: Simplify right side
   72,298.31x = 2,137,196,795.13
5. Step 5: Solve for x
   x = 2,137,196,795.13/72,298.31
6. Step 6: Final answer
   x = 29,560.81