Finding the Fourth Proportional to 122,969.34, 169,633.50 and 77,631

Step by Step Solution

1. Step 1: Write the proportion equation
   122,969.34 : 169,633.50 = 77,631 : x
2. Step 2: Convert to fraction form
   122,969.34/169,633.50 = 77,631/x
3. Step 3: Cross multiply
   122,969.34x = 169,633.50 × 77,631
4. Step 4: Simplify right side
   122,969.34x = 13,168,818,238.50
5. Step 5: Solve for x
   x = 13,168,818,238.50/122,969.34
6. Step 6: Final answer
   x = 107,090.26