Finding the Fourth Proportional to 47,078.31, 64,985.76 and 31,184.31

Step by Step Solution

1. Step 1: Write the proportion equation
   47,078.31 : 64,985.76 = 31,184.31 : x
2. Step 2: Convert to fraction form
   47,078.31/64,985.76 = 31,184.31/x
3. Step 3: Cross multiply
   47,078.31x = 64,985.76 × 31,184.31
4. Step 4: Simplify right side
   47,078.31x = 2,026,536,085.43
5. Step 5: Solve for x
   x = 2,026,536,085.43/47,078.31
6. Step 6: Final answer
   x = 43,046.07