Finding the Fourth Proportional to 109,422.70, 164,134.01 and 84,499.09

Step by Step Solution

1. Step 1: Write the proportion equation
   109,422.70 : 164,134.01 = 84,499.09 : x
2. Step 2: Convert to fraction form
   109,422.70/164,134.01 = 84,499.09/x
3. Step 3: Cross multiply
   109,422.70x = 164,134.01 × 84,499.09
4. Step 4: Simplify right side
   109,422.70x = 13,869,174,283.96
5. Step 5: Solve for x
   x = 13,869,174,283.96/109,422.70
6. Step 6: Final answer
   x = 126,748.61