Finding the Fourth Proportional to 113,667.96, 156,870.34 and 65,920.88

Step by Step Solution

1. Step 1: Write the proportion equation
   113,667.96 : 156,870.34 = 65,920.88 : x
2. Step 2: Convert to fraction form
   113,667.96/156,870.34 = 65,920.88/x
3. Step 3: Cross multiply
   113,667.96x = 156,870.34 × 65,920.88
4. Step 4: Simplify right side
   113,667.96x = 10,341,030,858.70
5. Step 5: Solve for x
   x = 10,341,030,858.70/113,667.96
6. Step 6: Final answer
   x = 90,975.78