Finding the Fourth Proportional to 109,060.56, 163,666.17 and 71,638.56

Step by Step Solution

1. Step 1: Write the proportion equation
   109,060.56 : 163,666.17 = 71,638.56 : x
2. Step 2: Convert to fraction form
   109,060.56/163,666.17 = 71,638.56/x
3. Step 3: Cross multiply
   109,060.56x = 163,666.17 × 71,638.56
4. Step 4: Simplify right side
   109,060.56x = 11,724,808,739.52
5. Step 5: Solve for x
   x = 11,724,808,739.52/109,060.56
6. Step 6: Final answer
   x = 107,507.32