Finding the Fourth Proportional to 112,321.04, 155,011.20 and 64,589.36

Step by Step Solution

1. Step 1: Write the proportion equation
   112,321.04 : 155,011.20 = 64,589.36 : x
2. Step 2: Convert to fraction form
   112,321.04/155,011.20 = 64,589.36/x
3. Step 3: Cross multiply
   112,321.04x = 155,011.20 × 64,589.36
4. Step 4: Simplify right side
   112,321.04x = 10,012,074,200.83
5. Step 5: Solve for x
   x = 10,012,074,200.83/112,321.04
6. Step 6: Final answer
   x = 89,138.01