Finding the Fourth Proportional to 19,611.96, 29,408.71 and 7,123.15

Step by Step Solution

1. Step 1: Write the proportion equation
   19,611.96 : 29,408.71 = 7,123.15 : x
2. Step 2: Convert to fraction form
   19,611.96/29,408.71 = 7,123.15/x
3. Step 3: Cross multiply
   19,611.96x = 29,408.71 × 7,123.15
4. Step 4: Simplify right side
   19,611.96x = 209,482,652.64
5. Step 5: Solve for x
   x = 209,482,652.64/19,611.96
6. Step 6: Final answer
   x = 10,681.37