Finding the Fourth Proportional to 14,870.61, 20,521.59 and 8,156.88

Step by Step Solution

1. Step 1: Write the proportion equation
   14,870.61 : 20,521.59 = 8,156.88 : x
2. Step 2: Convert to fraction form
   14,870.61/20,521.59 = 8,156.88/x
3. Step 3: Cross multiply
   14,870.61x = 20,521.59 × 8,156.88
4. Step 4: Simplify right side
   14,870.61x = 167,392,147.04
5. Step 5: Solve for x
   x = 167,392,147.04/14,870.61
6. Step 6: Final answer
   x = 11,256.58