Finding the Fourth Proportional to 113,196.61, 169,355.89 and 81,679.24

Step by Step Solution

1. Step 1: Write the proportion equation
   113,196.61 : 169,355.89 = 81,679.24 : x
2. Step 2: Convert to fraction form
   113,196.61/169,355.89 = 81,679.24/x
3. Step 3: Cross multiply
   113,196.61x = 169,355.89 × 81,679.24
4. Step 4: Simplify right side
   113,196.61x = 13,832,860,384.72
5. Step 5: Solve for x
   x = 13,832,860,384.72/113,196.61
6. Step 6: Final answer
   x = 122,202.07