Finding the Fourth Proportional to 79,079.29, 109,051.67 and 72,515.30

Step by Step Solution

1. Step 1: Write the proportion equation
   79,079.29 : 109,051.67 = 72,515.30 : x
2. Step 2: Convert to fraction form
   79,079.29/109,051.67 = 72,515.30/x
3. Step 3: Cross multiply
   79,079.29x = 109,051.67 × 72,515.30
4. Step 4: Simplify right side
   79,079.29x = 7,907,914,407.10
5. Step 5: Solve for x
   x = 7,907,914,407.10/79,079.29
6. Step 6: Final answer
   x = 99,999.82