Finding the Fourth Proportional to 15,848.52, 21,870.98 and 8,774.79

Step by Step Solution

1. Step 1: Write the proportion equation
   15,848.52 : 21,870.98 = 8,774.79 : x
2. Step 2: Convert to fraction form
   15,848.52/21,870.98 = 8,774.79/x
3. Step 3: Cross multiply
   15,848.52x = 21,870.98 × 8,774.79
4. Step 4: Simplify right side
   15,848.52x = 191,913,256.59
5. Step 5: Solve for x
   x = 191,913,256.59/15,848.52
6. Step 6: Final answer
   x = 12,109.22