Finding the Fourth Proportional to 143,508, 215,296.56 and 45,012

Step by Step Solution

1. Step 1: Write the proportion equation
   143,508 : 215,296.56 = 45,012 : x
2. Step 2: Convert to fraction form
   143,508/215,296.56 = 45,012/x
3. Step 3: Cross multiply
   143,508x = 215,296.56 × 45,012
4. Step 4: Simplify right side
   143,508x = 9,690,928,758.72
5. Step 5: Solve for x
   x = 9,690,928,758.72/143,508
6. Step 6: Final answer
   x = 67,528.84