Finding the Fourth Proportional to 140,123.34, 210,053.79 and 51,353.01

Step by Step Solution

1. Step 1: Write the proportion equation
   140,123.34 : 210,053.79 = 51,353.01 : x
2. Step 2: Convert to fraction form
   140,123.34/210,053.79 = 51,353.01/x
3. Step 3: Cross multiply
   140,123.34x = 210,053.79 × 51,353.01
4. Step 4: Simplify right side
   140,123.34x = 10,786,894,378.41
5. Step 5: Solve for x
   x = 10,786,894,378.41/140,123.34
6. Step 6: Final answer
   x = 76,981.42