Finding the Fourth Proportional to 28,419,362.28, 42,622,614.18 and 13,051,878.12

Step by Step Solution

1. Step 1: Write the proportion equation
   28,419,362.28 : 42,622,614.18 = 13,051,878.12 : x
2. Step 2: Convert to fraction form
   28,419,362.28/42,622,614.18 = 13,051,878.12/x
3. Step 3: Cross multiply
   28,419,362.28x = 42,622,614.18 × 13,051,878.12
4. Step 4: Simplify right side
   28,419,362.28x = 556,305,165,433,143.69
5. Step 5: Solve for x
   x = 556,305,165,433,143.69/28,419,362.28
6. Step 6: Final answer
   x = 19,574,864.49