Finding the Fourth Proportional to 72,745.56, 109,117.86 and 18,710.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,745.56 : 109,117.86 = 18,710.16 : x
2. Step 2: Convert to fraction form
   72,745.56/109,117.86 = 18,710.16/x
3. Step 3: Cross multiply
   72,745.56x = 109,117.86 × 18,710.16
4. Step 4: Simplify right side
   72,745.56x = 2,041,612,619.46
5. Step 5: Solve for x
   x = 2,041,612,619.46/72,745.56
6. Step 6: Final answer
   x = 28,065.12