Finding the Fourth Proportional to 72,513.18, 108,769.86 and 19,930.50

Step by Step Solution

1. Step 1: Write the proportion equation
   72,513.18 : 108,769.86 = 19,930.50 : x
2. Step 2: Convert to fraction form
   72,513.18/108,769.86 = 19,930.50/x
3. Step 3: Cross multiply
   72,513.18x = 108,769.86 × 19,930.50
4. Step 4: Simplify right side
   72,513.18x = 2,167,837,694.73
5. Step 5: Solve for x
   x = 2,167,837,694.73/72,513.18
6. Step 6: Final answer
   x = 29,895.77