Finding the Fourth Proportional to 12,445.65, 18,669.78 and 5,870.07

Step by Step Solution

1. Step 1: Write the proportion equation
   12,445.65 : 18,669.78 = 5,870.07 : x
2. Step 2: Convert to fraction form
   12,445.65/18,669.78 = 5,870.07/x
3. Step 3: Cross multiply
   12,445.65x = 18,669.78 × 5,870.07
4. Step 4: Simplify right side
   12,445.65x = 109,592,915.48
5. Step 5: Solve for x
   x = 109,592,915.48/12,445.65
6. Step 6: Final answer
   x = 8,805.72