Finding the Fourth Proportional to 140,311.89, 210,461.00 and 51,558.57

Step by Step Solution

1. Step 1: Write the proportion equation
   140,311.89 : 210,461.00 = 51,558.57 : x
2. Step 2: Convert to fraction form
   140,311.89/210,461.00 = 51,558.57/x
3. Step 3: Cross multiply
   140,311.89x = 210,461.00 × 51,558.57
4. Step 4: Simplify right side
   140,311.89x = 10,851,067,942.98
5. Step 5: Solve for x
   x = 10,851,067,942.98/140,311.89
6. Step 6: Final answer
   x = 77,335.34