Finding the Fourth Proportional to 91,870.28, 126,788.34 and 51,586.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,870.28 : 126,788.34 = 51,586.72 : x
2. Step 2: Convert to fraction form
   91,870.28/126,788.34 = 51,586.72/x
3. Step 3: Cross multiply
   91,870.28x = 126,788.34 × 51,586.72
4. Step 4: Simplify right side
   91,870.28x = 6,540,594,594.84
5. Step 5: Solve for x
   x = 6,540,594,594.84/91,870.28
6. Step 6: Final answer
   x = 71,193.80