Finding the Fourth Proportional to 14,085.86, 19,438.79 and 7,712.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,085.86 : 19,438.79 = 7,712.72 : x
2. Step 2: Convert to fraction form
   14,085.86/19,438.79 = 7,712.72/x
3. Step 3: Cross multiply
   14,085.86x = 19,438.79 × 7,712.72
4. Step 4: Simplify right side
   14,085.86x = 149,925,905.85
5. Step 5: Solve for x
   x = 149,925,905.85/14,085.86
6. Step 6: Final answer
   x = 10,643.72