Finding the Fourth Proportional to 117,772, 162,527.92 and 64,780

Step by Step Solution

1. Step 1: Write the proportion equation
   117,772 : 162,527.92 = 64,780 : x
2. Step 2: Convert to fraction form
   117,772/162,527.92 = 64,780/x
3. Step 3: Cross multiply
   117,772x = 162,527.92 × 64,780
4. Step 4: Simplify right side
   117,772x = 10,528,558,657.60
5. Step 5: Solve for x
   x = 10,528,558,657.60/117,772
6. Step 6: Final answer
   x = 89,397.81