Finding the Fourth Proportional to 78,765.58, 118,100.78 and 31,387.96

Step by Step Solution

1. Step 1: Write the proportion equation
   78,765.58 : 118,100.78 = 31,387.96 : x
2. Step 2: Convert to fraction form
   78,765.58/118,100.78 = 31,387.96/x
3. Step 3: Cross multiply
   78,765.58x = 118,100.78 × 31,387.96
4. Step 4: Simplify right side
   78,765.58x = 3,706,941,811.17
5. Step 5: Solve for x
   x = 3,706,941,811.17/78,765.58
6. Step 6: Final answer
   x = 47,062.97