Finding the Fourth Proportional to 72,077.84, 108,116.50 and 19,487.31

Step by Step Solution

1. Step 1: Write the proportion equation
   72,077.84 : 108,116.50 = 19,487.31 : x
2. Step 2: Convert to fraction form
   72,077.84/108,116.50 = 19,487.31/x
3. Step 3: Cross multiply
   72,077.84x = 108,116.50 × 19,487.31
4. Step 4: Simplify right side
   72,077.84x = 2,106,899,751.62
5. Step 5: Solve for x
   x = 2,106,899,751.62/72,077.84
6. Step 6: Final answer
   x = 29,230.89