Finding the Fourth Proportional to 37,917.36, 52,323.59 and 20,921.74

Step by Step Solution

1. Step 1: Write the proportion equation
   37,917.36 : 52,323.59 = 20,921.74 : x
2. Step 2: Convert to fraction form
   37,917.36/52,323.59 = 20,921.74/x
3. Step 3: Cross multiply
   37,917.36x = 52,323.59 × 20,921.74
4. Step 4: Simplify right side
   37,917.36x = 1,094,700,467.34
5. Step 5: Solve for x
   x = 1,094,700,467.34/37,917.36
6. Step 6: Final answer
   x = 28,870.69