Finding the Fourth Proportional to 53,196.78, 73,409.34 and 28,997.21

Step by Step Solution

1. Step 1: Write the proportion equation
   53,196.78 : 73,409.34 = 28,997.21 : x
2. Step 2: Convert to fraction form
   53,196.78/73,409.34 = 28,997.21/x
3. Step 3: Cross multiply
   53,196.78x = 73,409.34 × 28,997.21
4. Step 4: Simplify right side
   53,196.78x = 2,128,666,047.94
5. Step 5: Solve for x
   x = 2,128,666,047.94/53,196.78
6. Step 6: Final answer
   x = 40,014.94