Finding the Fourth Proportional to 39,060.34, 53,903.25 and 21,155.34

Step by Step Solution

1. Step 1: Write the proportion equation
   39,060.34 : 53,903.25 = 21,155.34 : x
2. Step 2: Convert to fraction form
   39,060.34/53,903.25 = 21,155.34/x
3. Step 3: Cross multiply
   39,060.34x = 53,903.25 × 21,155.34
4. Step 4: Simplify right side
   39,060.34x = 1,140,341,580.86
5. Step 5: Solve for x
   x = 1,140,341,580.86/39,060.34
6. Step 6: Final answer
   x = 29,194.36