Finding the Fourth Proportional to 37,043.31, 51,119.25 and 21,128.02

Step by Step Solution

1. Step 1: Write the proportion equation
   37,043.31 : 51,119.25 = 21,128.02 : x
2. Step 2: Convert to fraction form
   37,043.31/51,119.25 = 21,128.02/x
3. Step 3: Cross multiply
   37,043.31x = 51,119.25 × 21,128.02
4. Step 4: Simplify right side
   37,043.31x = 1,080,048,536.39
5. Step 5: Solve for x
   x = 1,080,048,536.39/37,043.31
6. Step 6: Final answer
   x = 29,156.37