Finding the Fourth Proportional to 103,215.80, 142,404.15 and 60,185.55

Step by Step Solution

1. Step 1: Write the proportion equation
   103,215.80 : 142,404.15 = 60,185.55 : x
2. Step 2: Convert to fraction form
   103,215.80/142,404.15 = 60,185.55/x
3. Step 3: Cross multiply
   103,215.80x = 142,404.15 × 60,185.55
4. Step 4: Simplify right side
   103,215.80x = 8,570,672,090.03
5. Step 5: Solve for x
   x = 8,570,672,090.03/103,215.80
6. Step 6: Final answer
   x = 83,036.44