Finding the Fourth Proportional to 142,415.56, 213,666.16 and 42,579

Step by Step Solution

1. Step 1: Write the proportion equation
   142,415.56 : 213,666.16 = 42,579 : x
2. Step 2: Convert to fraction form
   142,415.56/213,666.16 = 42,579/x
3. Step 3: Cross multiply
   142,415.56x = 213,666.16 × 42,579
4. Step 4: Simplify right side
   142,415.56x = 9,097,691,426.64
5. Step 5: Solve for x
   x = 9,097,691,426.64/142,415.56
6. Step 6: Final answer
   x = 63,881.30