Finding the Fourth Proportional to 51,434.31, 70,985.91 and 28,774.56

Step by Step Solution

1. Step 1: Write the proportion equation
   51,434.31 : 70,985.91 = 28,774.56 : x
2. Step 2: Convert to fraction form
   51,434.31/70,985.91 = 28,774.56/x
3. Step 3: Cross multiply
   51,434.31x = 70,985.91 × 28,774.56
4. Step 4: Simplify right side
   51,434.31x = 2,042,588,326.45
5. Step 5: Solve for x
   x = 2,042,588,326.45/51,434.31
6. Step 6: Final answer
   x = 39,712.56