Finding the Fourth Proportional to 161,005.79, 241,492.28 and 42,689.09

Step by Step Solution

1. Step 1: Write the proportion equation
   161,005.79 : 241,492.28 = 42,689.09 : x
2. Step 2: Convert to fraction form
   161,005.79/241,492.28 = 42,689.09/x
3. Step 3: Cross multiply
   161,005.79x = 241,492.28 × 42,689.09
4. Step 4: Simplify right side
   161,005.79x = 10,309,084,254.32
5. Step 5: Solve for x
   x = 10,309,084,254.32/161,005.79
6. Step 6: Final answer
   x = 64,029.28