Finding the Fourth Proportional to 103,055.03, 142,144.79 and 72,492.92

Step by Step Solution

1. Step 1: Write the proportion equation
   103,055.03 : 142,144.79 = 72,492.92 : x
2. Step 2: Convert to fraction form
   103,055.03/142,144.79 = 72,492.92/x
3. Step 3: Cross multiply
   103,055.03x = 142,144.79 × 72,492.92
4. Step 4: Simplify right side
   103,055.03x = 10,304,490,360.40
5. Step 5: Solve for x
   x = 10,304,490,360.40/103,055.03
6. Step 6: Final answer
   x = 99,990.18