Finding the Fourth Proportional to 57,870.01, 86,782.99 and 20,423.10

Step by Step Solution

1. Step 1: Write the proportion equation
   57,870.01 : 86,782.99 = 20,423.10 : x
2. Step 2: Convert to fraction form
   57,870.01/86,782.99 = 20,423.10/x
3. Step 3: Cross multiply
   57,870.01x = 86,782.99 × 20,423.10
4. Step 4: Simplify right side
   57,870.01x = 1,772,377,683.07
5. Step 5: Solve for x
   x = 1,772,377,683.07/57,870.01
6. Step 6: Final answer
   x = 30,626.88