Finding the Fourth Proportional to 13,898.41, 19,178.01 and 7,929.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,898.41 : 19,178.01 = 7,929.72 : x
2. Step 2: Convert to fraction form
   13,898.41/19,178.01 = 7,929.72/x
3. Step 3: Cross multiply
   13,898.41x = 19,178.01 × 7,929.72
4. Step 4: Simplify right side
   13,898.41x = 152,076,249.46
5. Step 5: Solve for x
   x = 152,076,249.46/13,898.41
6. Step 6: Final answer
   x = 10,941.99