Finding the Fourth Proportional to 42,679.27, 64,019.85 and 11,090.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42,679.27 : 64,019.85 = 11,090.58 : x
2. Step 2: Convert to fraction form
   42,679.27/64,019.85 = 11,090.58/x
3. Step 3: Cross multiply
   42,679.27x = 64,019.85 × 11,090.58
4. Step 4: Simplify right side
   42,679.27x = 710,017,268.01
5. Step 5: Solve for x
   x = 710,017,268.01/42,679.27
6. Step 6: Final answer
   x = 16,636.12