Finding the Fourth Proportional to 103,242.58, 142,323.95 and 72,974.50

Step by Step Solution

1. Step 1: Write the proportion equation
   103,242.58 : 142,323.95 = 72,974.50 : x
2. Step 2: Convert to fraction form
   103,242.58/142,323.95 = 72,974.50/x
3. Step 3: Cross multiply
   103,242.58x = 142,323.95 × 72,974.50
4. Step 4: Simplify right side
   103,242.58x = 10,386,018,012.78
5. Step 5: Solve for x
   x = 10,386,018,012.78/103,242.58
6. Step 6: Final answer
   x = 100,598.21