Finding the Fourth Proportional to 231,690.72, 319,638.16 and 140,973.96

Step by Step Solution

1. Step 1: Write the proportion equation
   231,690.72 : 319,638.16 = 140,973.96 : x
2. Step 2: Convert to fraction form
   231,690.72/319,638.16 = 140,973.96/x
3. Step 3: Cross multiply
   231,690.72x = 319,638.16 × 140,973.96
4. Step 4: Simplify right side
   231,690.72x = 45,060,657,182.31
5. Step 5: Solve for x
   x = 45,060,657,182.31/231,690.72
6. Step 6: Final answer
   x = 194,486.24