Finding the Fourth Proportional to 142,528.61, 213,866.69 and 103,408.62

Step by Step Solution

1. Step 1: Write the proportion equation
   142,528.61 : 213,866.69 = 103,408.62 : x
2. Step 2: Convert to fraction form
   142,528.61/213,866.69 = 103,408.62/x
3. Step 3: Cross multiply
   142,528.61x = 213,866.69 × 103,408.62
4. Step 4: Simplify right side
   142,528.61x = 22,115,658,759.82
5. Step 5: Solve for x
   x = 22,115,658,759.82/142,528.61
6. Step 6: Final answer
   x = 155,166.46