Finding the Fourth Proportional to 78,074.84, 107,805.40 and 72,104.34

Step by Step Solution

1. Step 1: Write the proportion equation
   78,074.84 : 107,805.40 = 72,104.34 : x
2. Step 2: Convert to fraction form
   78,074.84/107,805.40 = 72,104.34/x
3. Step 3: Cross multiply
   78,074.84x = 107,805.40 × 72,104.34
4. Step 4: Simplify right side
   78,074.84x = 7,773,237,215.44
5. Step 5: Solve for x
   x = 7,773,237,215.44/78,074.84
6. Step 6: Final answer
   x = 99,561.36