Finding the Fourth Proportional to 62,990.49, 94,485.59 and 20,870.70

Step by Step Solution

1. Step 1: Write the proportion equation
   62,990.49 : 94,485.59 = 20,870.70 : x
2. Step 2: Convert to fraction form
   62,990.49/94,485.59 = 20,870.70/x
3. Step 3: Cross multiply
   62,990.49x = 94,485.59 × 20,870.70
4. Step 4: Simplify right side
   62,990.49x = 1,971,980,022.80
5. Step 5: Solve for x
   x = 1,971,980,022.80/62,990.49
6. Step 6: Final answer
   x = 31,305.99