Finding the Fourth Proportional to 42,971.92, 64,460.98 and 17,986.84

Step by Step Solution

1. Step 1: Write the proportion equation
   42,971.92 : 64,460.98 = 17,986.84 : x
2. Step 2: Convert to fraction form
   42,971.92/64,460.98 = 17,986.84/x
3. Step 3: Cross multiply
   42,971.92x = 64,460.98 × 17,986.84
4. Step 4: Simplify right side
   42,971.92x = 1,159,449,333.50
5. Step 5: Solve for x
   x = 1,159,449,333.50/42,971.92
6. Step 6: Final answer
   x = 26,981.56