Finding the Fourth Proportional to 109,064.56, 163,672.17 and 71,642.56

Step by Step Solution

1. Step 1: Write the proportion equation
   109,064.56 : 163,672.17 = 71,642.56 : x
2. Step 2: Convert to fraction form
   109,064.56/163,672.17 = 71,642.56/x
3. Step 3: Cross multiply
   109,064.56x = 163,672.17 × 71,642.56
4. Step 4: Simplify right side
   109,064.56x = 11,725,893,259.56
5. Step 5: Solve for x
   x = 11,725,893,259.56/109,064.56
6. Step 6: Final answer
   x = 107,513.32