Finding the Fourth Proportional to 43,139.88, 64,322.70 and 42,352.56

Step by Step Solution

1. Step 1: Write the proportion equation
   43,139.88 : 64,322.70 = 42,352.56 : x
2. Step 2: Convert to fraction form
   43,139.88/64,322.70 = 42,352.56/x
3. Step 3: Cross multiply
   43,139.88x = 64,322.70 × 42,352.56
4. Step 4: Simplify right side
   43,139.88x = 2,724,231,011.11
5. Step 5: Solve for x
   x = 2,724,231,011.11/43,139.88
6. Step 6: Final answer
   x = 63,148.79