Finding the Fourth Proportional to 42,971.29, 64,460.01 and 17,986.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,971.29 : 64,460.01 = 17,986.18 : x
2. Step 2: Convert to fraction form
   42,971.29/64,460.01 = 17,986.18/x
3. Step 3: Cross multiply
   42,971.29x = 64,460.01 × 17,986.18
4. Step 4: Simplify right side
   42,971.29x = 1,159,389,342.66
5. Step 5: Solve for x
   x = 1,159,389,342.66/42,971.29
6. Step 6: Final answer
   x = 26,980.56