Finding the Fourth Proportional to 140,521.88, 210,865.98 and 51,837.72

Step by Step Solution

1. Step 1: Write the proportion equation
   140,521.88 : 210,865.98 = 51,837.72 : x
2. Step 2: Convert to fraction form
   140,521.88/210,865.98 = 51,837.72/x
3. Step 3: Cross multiply
   140,521.88x = 210,865.98 × 51,837.72
4. Step 4: Simplify right side
   140,521.88x = 10,930,811,628.77
5. Step 5: Solve for x
   x = 10,930,811,628.77/140,521.88
6. Step 6: Final answer
   x = 77,787.26