Finding the Fourth Proportional to 51,128.42, 70,556.55 and 29,621.10

Step by Step Solution

1. Step 1: Write the proportion equation
   51,128.42 : 70,556.55 = 29,621.10 : x
2. Step 2: Convert to fraction form
   51,128.42/70,556.55 = 29,621.10/x
3. Step 3: Cross multiply
   51,128.42x = 70,556.55 × 29,621.10
4. Step 4: Simplify right side
   51,128.42x = 2,089,962,744.89
5. Step 5: Solve for x
   x = 2,089,962,744.89/51,128.42
6. Step 6: Final answer
   x = 40,876.73