Finding the Fourth Proportional to 19,910.53, 29,870.25 and 5,870.40

Step by Step Solution

1. Step 1: Write the proportion equation
   19,910.53 : 29,870.25 = 5,870.40 : x
2. Step 2: Convert to fraction form
   19,910.53/29,870.25 = 5,870.40/x
3. Step 3: Cross multiply
   19,910.53x = 29,870.25 × 5,870.40
4. Step 4: Simplify right side
   19,910.53x = 175,350,315.60
5. Step 5: Solve for x
   x = 175,350,315.60/19,910.53
6. Step 6: Final answer
   x = 8,806.91