Finding the Fourth Proportional to 37,128.90, 51,238.24 and 20,997.06

Step by Step Solution

1. Step 1: Write the proportion equation
   37,128.90 : 51,238.24 = 20,997.06 : x
2. Step 2: Convert to fraction form
   37,128.90/51,238.24 = 20,997.06/x
3. Step 3: Cross multiply
   37,128.90x = 51,238.24 × 20,997.06
4. Step 4: Simplify right side
   37,128.90x = 1,075,852,399.57
5. Step 5: Solve for x
   x = 1,075,852,399.57/37,128.90
6. Step 6: Final answer
   x = 28,976.15