Finding the Fourth Proportional to 117,401.84, 161,996.28 and 77,131.76

Step by Step Solution

1. Step 1: Write the proportion equation
   117,401.84 : 161,996.28 = 77,131.76 : x
2. Step 2: Convert to fraction form
   117,401.84/161,996.28 = 77,131.76/x
3. Step 3: Cross multiply
   117,401.84x = 161,996.28 × 77,131.76
4. Step 4: Simplify right side
   117,401.84x = 12,495,058,189.85
5. Step 5: Solve for x
   x = 12,495,058,189.85/117,401.84
6. Step 6: Final answer
   x = 106,429.83