Finding the Fourth Proportional to 142,139, 213,209.58 and 48,645.56

Step by Step Solution

1. Step 1: Write the proportion equation
   142,139 : 213,209.58 = 48,645.56 : x
2. Step 2: Convert to fraction form
   142,139/213,209.58 = 48,645.56/x
3. Step 3: Cross multiply
   142,139x = 213,209.58 × 48,645.56
4. Step 4: Simplify right side
   142,139x = 10,371,699,416.46
5. Step 5: Solve for x
   x = 10,371,699,416.46/142,139
6. Step 6: Final answer
   x = 72,968.71