Finding the Fourth Proportional to 37,991.31, 52,428.17 and 20,764.02

Step by Step Solution

1. Step 1: Write the proportion equation
   37,991.31 : 52,428.17 = 20,764.02 : x
2. Step 2: Convert to fraction form
   37,991.31/52,428.17 = 20,764.02/x
3. Step 3: Cross multiply
   37,991.31x = 52,428.17 × 20,764.02
4. Step 4: Simplify right side
   37,991.31x = 1,088,619,649.60
5. Step 5: Solve for x
   x = 1,088,619,649.60/37,991.31
6. Step 6: Final answer
   x = 28,654.44