Finding the Fourth Proportional to 78,805.47, 118,264.99 and 31,393.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,805.47 : 118,264.99 = 31,393.12 : x
2. Step 2: Convert to fraction form
   78,805.47/118,264.99 = 31,393.12/x
3. Step 3: Cross multiply
   78,805.47x = 118,264.99 × 31,393.12
4. Step 4: Simplify right side
   78,805.47x = 3,712,706,648.72
5. Step 5: Solve for x
   x = 3,712,706,648.72/78,805.47
6. Step 6: Final answer
   x = 47,112.30