Finding the Fourth Proportional to 112,545, 155,314.62 and 64,790.64

Step by Step Solution

1. Step 1: Write the proportion equation
   112,545 : 155,314.62 = 64,790.64 : x
2. Step 2: Convert to fraction form
   112,545/155,314.62 = 64,790.64/x
3. Step 3: Cross multiply
   112,545x = 155,314.62 × 64,790.64
4. Step 4: Simplify right side
   112,545x = 10,062,933,631.16
5. Step 5: Solve for x
   x = 10,062,933,631.16/112,545
6. Step 6: Final answer
   x = 89,412.53