Finding the Fourth Proportional to 74,771.60, 103,131.54 and 72,300.29

Step by Step Solution

1. Step 1: Write the proportion equation
   74,771.60 : 103,131.54 = 72,300.29 : x
2. Step 2: Convert to fraction form
   74,771.60/103,131.54 = 72,300.29/x
3. Step 3: Cross multiply
   74,771.60x = 103,131.54 × 72,300.29
4. Step 4: Simplify right side
   74,771.60x = 7,456,439,734.49
5. Step 5: Solve for x
   x = 7,456,439,734.49/74,771.60
6. Step 6: Final answer
   x = 99,722.89