Finding the Fourth Proportional to 112,530.80, 155,311.59 and 64,811.76

Step by Step Solution

1. Step 1: Write the proportion equation
   112,530.80 : 155,311.59 = 64,811.76 : x
2. Step 2: Convert to fraction form
   112,530.80/155,311.59 = 64,811.76/x
3. Step 3: Cross multiply
   112,530.80x = 155,311.59 × 64,811.76
4. Step 4: Simplify right side
   112,530.80x = 10,066,017,496.30
5. Step 5: Solve for x
   x = 10,066,017,496.30/112,530.80
6. Step 6: Final answer
   x = 89,451.23