Finding the Fourth Proportional to 51,307.52, 70,784.89 and 31,156.79

Step by Step Solution

1. Step 1: Write the proportion equation
   51,307.52 : 70,784.89 = 31,156.79 : x
2. Step 2: Convert to fraction form
   51,307.52/70,784.89 = 31,156.79/x
3. Step 3: Cross multiply
   51,307.52x = 70,784.89 × 31,156.79
4. Step 4: Simplify right side
   51,307.52x = 2,205,429,521.09
5. Step 5: Solve for x
   x = 2,205,429,521.09/51,307.52
6. Step 6: Final answer
   x = 42,984.53