Finding the Fourth Proportional to 72,878.34, 109,148 and 70,352.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72,878.34 : 109,148 = 70,352.84 : x
2. Step 2: Convert to fraction form
   72,878.34/109,148 = 70,352.84/x
3. Step 3: Cross multiply
   72,878.34x = 109,148 × 70,352.84
4. Step 4: Simplify right side
   72,878.34x = 7,678,871,780.32
5. Step 5: Solve for x
   x = 7,678,871,780.32/72,878.34
6. Step 6: Final answer
   x = 105,365.62