Finding the Fourth Proportional to 42,977.71, 64,469.58 and 17,992.54

Step by Step Solution

1. Step 1: Write the proportion equation
   42,977.71 : 64,469.58 = 17,992.54 : x
2. Step 2: Convert to fraction form
   42,977.71/64,469.58 = 17,992.54/x
3. Step 3: Cross multiply
   42,977.71x = 64,469.58 × 17,992.54
4. Step 4: Simplify right side
   42,977.71x = 1,159,971,496.93
5. Step 5: Solve for x
   x = 1,159,971,496.93/42,977.71
6. Step 6: Final answer
   x = 26,990.07