Finding the Fourth Proportional to 10,123.92, 13,970.88 and 7,136.64

Step by Step Solution

1. Step 1: Write the proportion equation
   10,123.92 : 13,970.88 = 7,136.64 : x
2. Step 2: Convert to fraction form
   10,123.92/13,970.88 = 7,136.64/x
3. Step 3: Cross multiply
   10,123.92x = 13,970.88 × 7,136.64
4. Step 4: Simplify right side
   10,123.92x = 99,705,141.04
5. Step 5: Solve for x
   x = 99,705,141.04/10,123.92
6. Step 6: Final answer
   x = 9,848.47