Finding the Fourth Proportional to 94,840, 142,212.60 and 31,638.12

Step by Step Solution

1. Step 1: Write the proportion equation
   94,840 : 142,212.60 = 31,638.12 : x
2. Step 2: Convert to fraction form
   94,840/142,212.60 = 31,638.12/x
3. Step 3: Cross multiply
   94,840x = 142,212.60 × 31,638.12
4. Step 4: Simplify right side
   94,840x = 4,499,339,304.31
5. Step 5: Solve for x
   x = 4,499,339,304.31/94,840
6. Step 6: Final answer
   x = 47,441.37