Finding the Fourth Proportional to 9,923.88, 14,889.56 and 5,243.70

Step by Step Solution

1. Step 1: Write the proportion equation
   9,923.88 : 14,889.56 = 5,243.70 : x
2. Step 2: Convert to fraction form
   9,923.88/14,889.56 = 5,243.70/x
3. Step 3: Cross multiply
   9,923.88x = 14,889.56 × 5,243.70
4. Step 4: Simplify right side
   9,923.88x = 78,076,385.77
5. Step 5: Solve for x
   x = 78,076,385.77/9,923.88
6. Step 6: Final answer
   x = 7,867.53