Finding the Fourth Proportional to 115,111.31, 158,853.89 and 66,722.59

Step by Step Solution

1. Step 1: Write the proportion equation
   115,111.31 : 158,853.89 = 66,722.59 : x
2. Step 2: Convert to fraction form
   115,111.31/158,853.89 = 66,722.59/x
3. Step 3: Cross multiply
   115,111.31x = 158,853.89 × 66,722.59
4. Step 4: Simplify right side
   115,111.31x = 10,599,141,844.49
5. Step 5: Solve for x
   x = 10,599,141,844.49/115,111.31
6. Step 6: Final answer
   x = 92,077.33