Finding the Fourth Proportional to 109,308.89, 163,592.99 and 67,215.63

Step by Step Solution

1. Step 1: Write the proportion equation
   109,308.89 : 163,592.99 = 67,215.63 : x
2. Step 2: Convert to fraction form
   109,308.89/163,592.99 = 67,215.63/x
3. Step 3: Cross multiply
   109,308.89x = 163,592.99 × 67,215.63
4. Step 4: Simplify right side
   109,308.89x = 10,996,006,054.47
5. Step 5: Solve for x
   x = 10,996,006,054.47/109,308.89
6. Step 6: Final answer
   x = 100,595.71