Finding the Fourth Proportional to 112,609, 155,362.68 and 64,861.24

Step by Step Solution

1. Step 1: Write the proportion equation
   112,609 : 155,362.68 = 64,861.24 : x
2. Step 2: Convert to fraction form
   112,609/155,362.68 = 64,861.24/x
3. Step 3: Cross multiply
   112,609x = 155,362.68 × 64,861.24
4. Step 4: Simplify right side
   112,609x = 10,077,016,074.52
5. Step 5: Solve for x
   x = 10,077,016,074.52/112,609
6. Step 6: Final answer
   x = 89,486.77