Finding the Fourth Proportional to 137,572.80, 189,889.83 and 81,016.98

Step by Step Solution

1. Step 1: Write the proportion equation
   137,572.80 : 189,889.83 = 81,016.98 : x
2. Step 2: Convert to fraction form
   137,572.80/189,889.83 = 81,016.98/x
3. Step 3: Cross multiply
   137,572.80x = 189,889.83 × 81,016.98
4. Step 4: Simplify right side
   137,572.80x = 15,384,300,559.31
5. Step 5: Solve for x
   x = 15,384,300,559.31/137,572.80
6. Step 6: Final answer
   x = 111,826.62