Finding the Fourth Proportional to 51,299.91, 70,784.82 and 31,152.78

Step by Step Solution

1. Step 1: Write the proportion equation
   51,299.91 : 70,784.82 = 31,152.78 : x
2. Step 2: Convert to fraction form
   51,299.91/70,784.82 = 31,152.78/x
3. Step 3: Cross multiply
   51,299.91x = 70,784.82 × 31,152.78
4. Step 4: Simplify right side
   51,299.91x = 2,205,143,924.80
5. Step 5: Solve for x
   x = 2,205,143,924.80/51,299.91
6. Step 6: Final answer
   x = 42,985.34