Finding the Fourth Proportional to 37,939, 52,356.90 and 21,173.08

Step by Step Solution

1. Step 1: Write the proportion equation
   37,939 : 52,356.90 = 21,173.08 : x
2. Step 2: Convert to fraction form
   37,939/52,356.90 = 21,173.08/x
3. Step 3: Cross multiply
   37,939x = 52,356.90 × 21,173.08
4. Step 4: Simplify right side
   37,939x = 1,108,556,832.25
5. Step 5: Solve for x
   x = 1,108,556,832.25/37,939
6. Step 6: Final answer
   x = 29,219.45