Finding the Fourth Proportional to 14,072.34, 19,420.45 and 7,784.72

Step by Step Solution

1. Step 1: Write the proportion equation
   14,072.34 : 19,420.45 = 7,784.72 : x
2. Step 2: Convert to fraction form
   14,072.34/19,420.45 = 7,784.72/x
3. Step 3: Cross multiply
   14,072.34x = 19,420.45 × 7,784.72
4. Step 4: Simplify right side
   14,072.34x = 151,182,721.79
5. Step 5: Solve for x
   x = 151,182,721.79/14,072.34
6. Step 6: Final answer
   x = 10,743.25