Finding the Fourth Proportional to 37,906.56, 52,310.94 and 21,139.56

Step by Step Solution

1. Step 1: Write the proportion equation
   37,906.56 : 52,310.94 = 21,139.56 : x
2. Step 2: Convert to fraction form
   37,906.56/52,310.94 = 21,139.56/x
3. Step 3: Cross multiply
   37,906.56x = 52,310.94 × 21,139.56
4. Step 4: Simplify right side
   37,906.56x = 1,105,830,254.79
5. Step 5: Solve for x
   x = 1,105,830,254.79/37,906.56
6. Step 6: Final answer
   x = 29,172.53