Finding the Fourth Proportional to 113,612.05, 156,726.96 and 86,707.84

Step by Step Solution

1. Step 1: Write the proportion equation
   113,612.05 : 156,726.96 = 86,707.84 : x
2. Step 2: Convert to fraction form
   113,612.05/156,726.96 = 86,707.84/x
3. Step 3: Cross multiply
   113,612.05x = 156,726.96 × 86,707.84
4. Step 4: Simplify right side
   113,612.05x = 13,589,456,171.37
5. Step 5: Solve for x
   x = 13,589,456,171.37/113,612.05
6. Step 6: Final answer
   x = 119,612.81