Finding the Fourth Proportional to 140,524.77, 210,870.18 and 51,840.55

Step by Step Solution

1. Step 1: Write the proportion equation
   140,524.77 : 210,870.18 = 51,840.55 : x
2. Step 2: Convert to fraction form
   140,524.77/210,870.18 = 51,840.55/x
3. Step 3: Cross multiply
   140,524.77x = 210,870.18 × 51,840.55
4. Step 4: Simplify right side
   140,524.77x = 10,931,626,109.80
5. Step 5: Solve for x
   x = 10,931,626,109.80/140,524.77
6. Step 6: Final answer
   x = 77,791.45