Finding the Fourth Proportional to 51,437.81, 70,980.82 and 28,772.89

Step by Step Solution

1. Step 1: Write the proportion equation
   51,437.81 : 70,980.82 = 28,772.89 : x
2. Step 2: Convert to fraction form
   51,437.81/70,980.82 = 28,772.89/x
3. Step 3: Cross multiply
   51,437.81x = 70,980.82 × 28,772.89
4. Step 4: Simplify right side
   51,437.81x = 2,042,323,076.59
5. Step 5: Solve for x
   x = 2,042,323,076.59/51,437.81
6. Step 6: Final answer
   x = 39,704.70