Finding the Fourth Proportional to 113,814.31, 170,740.01 and 42,742.48

Step by Step Solution

1. Step 1: Write the proportion equation
   113,814.31 : 170,740.01 = 42,742.48 : x
2. Step 2: Convert to fraction form
   113,814.31/170,740.01 = 42,742.48/x
3. Step 3: Cross multiply
   113,814.31x = 170,740.01 × 42,742.48
4. Step 4: Simplify right side
   113,814.31x = 7,297,851,142.63
5. Step 5: Solve for x
   x = 7,297,851,142.63/113,814.31
6. Step 6: Final answer
   x = 64,120.68