Finding the Fourth Proportional to 9,931.17, 14,889.55 and 4,663.47

Step by Step Solution

1. Step 1: Write the proportion equation
   9,931.17 : 14,889.55 = 4,663.47 : x
2. Step 2: Convert to fraction form
   9,931.17/14,889.55 = 4,663.47/x
3. Step 3: Cross multiply
   9,931.17x = 14,889.55 × 4,663.47
4. Step 4: Simplify right side
   9,931.17x = 69,436,969.74
5. Step 5: Solve for x
   x = 69,436,969.74/9,931.17
6. Step 6: Final answer
   x = 6,991.82