Finding the Fourth Proportional to 113,422.23, 156,513.65 and 65,678.67

Step by Step Solution

1. Step 1: Write the proportion equation
   113,422.23 : 156,513.65 = 65,678.67 : x
2. Step 2: Convert to fraction form
   113,422.23/156,513.65 = 65,678.67/x
3. Step 3: Cross multiply
   113,422.23x = 156,513.65 × 65,678.67
4. Step 4: Simplify right side
   113,422.23x = 10,279,608,040.45
5. Step 5: Solve for x
   x = 10,279,608,040.45/113,422.23
6. Step 6: Final answer
   x = 90,631.33