Finding the Fourth Proportional to 300,635,216.75, 450,365,749.52 and 142,843,679.89

Step by Step Solution

1. Step 1: Write the proportion equation
   300,635,216.75 : 450,365,749.52 = 142,843,679.89 : x
2. Step 2: Convert to fraction form
   300,635,216.75/450,365,749.52 = 142,843,679.89/x
3. Step 3: Cross multiply
   300,635,216.75x = 450,365,749.52 × 142,843,679.89
4. Step 4: Simplify right side
   300,635,216.75x = 64,331,900,956,014,664
5. Step 5: Solve for x
   x = 64,331,900,956,014,664/300,635,216.75
6. Step 6: Final answer
   x = 213,986,576.99