Finding the Fourth Proportional to 140,615.42, 210,939.52 and 49,402.79

Step by Step Solution

1. Step 1: Write the proportion equation
   140,615.42 : 210,939.52 = 49,402.79 : x
2. Step 2: Convert to fraction form
   140,615.42/210,939.52 = 49,402.79/x
3. Step 3: Cross multiply
   140,615.42x = 210,939.52 × 49,402.79
4. Step 4: Simplify right side
   140,615.42x = 10,421,001,213.10
5. Step 5: Solve for x
   x = 10,421,001,213.10/140,615.42
6. Step 6: Final answer
   x = 74,109.94