Finding the Fourth Proportional to 117,805, 162,570.90 and 64,813

Step by Step Solution

1. Step 1: Write the proportion equation
   117,805 : 162,570.90 = 64,813 : x
2. Step 2: Convert to fraction form
   117,805/162,570.90 = 64,813/x
3. Step 3: Cross multiply
   117,805x = 162,570.90 × 64,813
4. Step 4: Simplify right side
   117,805x = 10,536,707,741.70
5. Step 5: Solve for x
   x = 10,536,707,741.70/117,805
6. Step 6: Final answer
   x = 89,441.94