Finding the Fourth Proportional to 78,589.96, 117,841.86 and 31,157

Step by Step Solution

1. Step 1: Write the proportion equation
   78,589.96 : 117,841.86 = 31,157 : x
2. Step 2: Convert to fraction form
   78,589.96/117,841.86 = 31,157/x
3. Step 3: Cross multiply
   78,589.96x = 117,841.86 × 31,157
4. Step 4: Simplify right side
   78,589.96x = 3,671,598,832.02
5. Step 5: Solve for x
   x = 3,671,598,832.02/78,589.96
6. Step 6: Final answer
   x = 46,718.42