Finding the Fourth Proportional to 113,215.68, 156,072.98 and 79,118.30

Step by Step Solution

1. Step 1: Write the proportion equation
   113,215.68 : 156,072.98 = 79,118.30 : x
2. Step 2: Convert to fraction form
   113,215.68/156,072.98 = 79,118.30/x
3. Step 3: Cross multiply
   113,215.68x = 156,072.98 × 79,118.30
4. Step 4: Simplify right side
   113,215.68x = 12,348,228,996.47
5. Step 5: Solve for x
   x = 12,348,228,996.47/113,215.68
6. Step 6: Final answer
   x = 109,068.19