Finding the Fourth Proportional to 78,645.42, 117,967.41 and 31,887.18

Step by Step Solution

1. Step 1: Write the proportion equation
   78,645.42 : 117,967.41 = 31,887.18 : x
2. Step 2: Convert to fraction form
   78,645.42/117,967.41 = 31,887.18/x
3. Step 3: Cross multiply
   78,645.42x = 117,967.41 × 31,887.18
4. Step 4: Simplify right side
   78,645.42x = 3,761,648,036.80
5. Step 5: Solve for x
   x = 3,761,648,036.80/78,645.42
6. Step 6: Final answer
   x = 47,830.48