Finding the Fourth Proportional to 19,123.76, 28,687.46 and 7,437.89

Step by Step Solution

1. Step 1: Write the proportion equation
   19,123.76 : 28,687.46 = 7,437.89 : x
2. Step 2: Convert to fraction form
   19,123.76/28,687.46 = 7,437.89/x
3. Step 3: Cross multiply
   19,123.76x = 28,687.46 × 7,437.89
4. Step 4: Simplify right side
   19,123.76x = 213,373,991.23
5. Step 5: Solve for x
   x = 213,373,991.23/19,123.76
6. Step 6: Final answer
   x = 11,157.54