Finding the Fourth Proportional to 113,980.50, 157,288.83 and 65,589.90

Step by Step Solution

1. Step 1: Write the proportion equation
   113,980.50 : 157,288.83 = 65,589.90 : x
2. Step 2: Convert to fraction form
   113,980.50/157,288.83 = 65,589.90/x
3. Step 3: Cross multiply
   113,980.50x = 157,288.83 × 65,589.90
4. Step 4: Simplify right side
   113,980.50x = 10,316,558,630.82
5. Step 5: Solve for x
   x = 10,316,558,630.82/113,980.50
6. Step 6: Final answer
   x = 90,511.61