Finding the Fourth Proportional to 140,761.72, 210,085.37 and 121,702.04

Step by Step Solution

1. Step 1: Write the proportion equation
   140,761.72 : 210,085.37 = 121,702.04 : x
2. Step 2: Convert to fraction form
   140,761.72/210,085.37 = 121,702.04/x
3. Step 3: Cross multiply
   140,761.72x = 210,085.37 × 121,702.04
4. Step 4: Simplify right side
   140,761.72x = 25,567,818,103.15
5. Step 5: Solve for x
   x = 25,567,818,103.15/140,761.72
6. Step 6: Final answer
   x = 181,639.00