Finding the Fourth Proportional to 128,111.56, 191,326.25 and 109,189.96

Step by Step Solution

1. Step 1: Write the proportion equation
   128,111.56 : 191,326.25 = 109,189.96 : x
2. Step 2: Convert to fraction form
   128,111.56/191,326.25 = 109,189.96/x
3. Step 3: Cross multiply
   128,111.56x = 191,326.25 × 109,189.96
4. Step 4: Simplify right side
   128,111.56x = 20,890,905,584.45
5. Step 5: Solve for x
   x = 20,890,905,584.45/128,111.56
6. Step 6: Final answer
   x = 163,068.08