Finding the Fourth Proportional to 115,081.72, 158,902.86 and 90,002.68

Step by Step Solution

1. Step 1: Write the proportion equation
   115,081.72 : 158,902.86 = 90,002.68 : x
2. Step 2: Convert to fraction form
   115,081.72/158,902.86 = 90,002.68/x
3. Step 3: Cross multiply
   115,081.72x = 158,902.86 × 90,002.68
4. Step 4: Simplify right side
   115,081.72x = 14,301,683,259.66
5. Step 5: Solve for x
   x = 14,301,683,259.66/115,081.72
6. Step 6: Final answer
   x = 124,274.15