Finding the Fourth Proportional to 78,778.84, 118,106.82 and 39,316.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,778.84 : 118,106.82 = 39,316.12 : x
2. Step 2: Convert to fraction form
   78,778.84/118,106.82 = 39,316.12/x
3. Step 3: Cross multiply
   78,778.84x = 118,106.82 × 39,316.12
4. Step 4: Simplify right side
   78,778.84x = 4,643,501,907.94
5. Step 5: Solve for x
   x = 4,643,501,907.94/78,778.84
6. Step 6: Final answer
   x = 58,943.52