Finding the Fourth Proportional to 37,897.76, 52,299.60 and 21,128.96

Step by Step Solution

1. Step 1: Write the proportion equation
   37,897.76 : 52,299.60 = 21,128.96 : x
2. Step 2: Convert to fraction form
   37,897.76/52,299.60 = 21,128.96/x
3. Step 3: Cross multiply
   37,897.76x = 52,299.60 × 21,128.96
4. Step 4: Simplify right side
   37,897.76x = 1,105,036,156.42
5. Step 5: Solve for x
   x = 1,105,036,156.42/37,897.76
6. Step 6: Final answer
   x = 29,158.35