Finding the Fourth Proportional to 34,740, 47,942.10 and 21,123.50

Step by Step Solution

1. Step 1: Write the proportion equation
   34,740 : 47,942.10 = 21,123.50 : x
2. Step 2: Convert to fraction form
   34,740/47,942.10 = 21,123.50/x
3. Step 3: Cross multiply
   34,740x = 47,942.10 × 21,123.50
4. Step 4: Simplify right side
   34,740x = 1,012,704,709.64
5. Step 5: Solve for x
   x = 1,012,704,709.64/34,740
6. Step 6: Final answer
   x = 29,150.97