Finding the Fourth Proportional to 62,981.72, 86,918.72 and 34,687.40

Step by Step Solution

1. Step 1: Write the proportion equation
   62,981.72 : 86,918.72 = 34,687.40 : x
2. Step 2: Convert to fraction form
   62,981.72/86,918.72 = 34,687.40/x
3. Step 3: Cross multiply
   62,981.72x = 86,918.72 × 34,687.40
4. Step 4: Simplify right side
   62,981.72x = 3,014,983,800.10
5. Step 5: Solve for x
   x = 3,014,983,800.10/62,981.72
6. Step 6: Final answer
   x = 47,870.78