Finding the Fourth Proportional to 109,423.23, 164,134.89 and 84,499.71

Step by Step Solution

1. Step 1: Write the proportion equation
   109,423.23 : 164,134.89 = 84,499.71 : x
2. Step 2: Convert to fraction form
   109,423.23/164,134.89 = 84,499.71/x
3. Step 3: Cross multiply
   109,423.23x = 164,134.89 × 84,499.71
4. Step 4: Simplify right side
   109,423.23x = 13,869,350,605.88
5. Step 5: Solve for x
   x = 13,869,350,605.88/109,423.23
6. Step 6: Final answer
   x = 126,749.60