Finding the Fourth Proportional to 113,981, 157,289.52 and 65,590.40

Step by Step Solution

1. Step 1: Write the proportion equation
   113,981 : 157,289.52 = 65,590.40 : x
2. Step 2: Convert to fraction form
   113,981/157,289.52 = 65,590.40/x
3. Step 3: Cross multiply
   113,981x = 157,289.52 × 65,590.40
4. Step 4: Simplify right side
   113,981x = 10,316,682,532.61
5. Step 5: Solve for x
   x = 10,316,682,532.61/113,981
6. Step 6: Final answer
   x = 90,512.30