Finding the Fourth Proportional to 103,300.47, 142,548.66 and 57,974.22

Step by Step Solution

1. Step 1: Write the proportion equation
   103,300.47 : 142,548.66 = 57,974.22 : x
2. Step 2: Convert to fraction form
   103,300.47/142,548.66 = 57,974.22/x
3. Step 3: Cross multiply
   103,300.47x = 142,548.66 × 57,974.22
4. Step 4: Simplify right side
   103,300.47x = 8,264,147,375.55
5. Step 5: Solve for x
   x = 8,264,147,375.55/103,300.47
6. Step 6: Final answer
   x = 80,001.06