Finding the Fourth Proportional to 47,079.31, 64,987.14 and 31,185.31

Step by Step Solution

1. Step 1: Write the proportion equation
   47,079.31 : 64,987.14 = 31,185.31 : x
2. Step 2: Convert to fraction form
   47,079.31/64,987.14 = 31,185.31/x
3. Step 3: Cross multiply
   47,079.31x = 64,987.14 × 31,185.31
4. Step 4: Simplify right side
   47,079.31x = 2,026,644,106.91
5. Step 5: Solve for x
   x = 2,026,644,106.91/47,079.31
6. Step 6: Final answer
   x = 43,047.45