Finding the Fourth Proportional to 72,603.60, 108,763.28 and 50,061.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,603.60 : 108,763.28 = 50,061.20 : x
2. Step 2: Convert to fraction form
   72,603.60/108,763.28 = 50,061.20/x
3. Step 3: Cross multiply
   72,603.60x = 108,763.28 × 50,061.20
4. Step 4: Simplify right side
   72,603.60x = 5,444,820,312.74
5. Step 5: Solve for x
   x = 5,444,820,312.74/72,603.60
6. Step 6: Final answer
   x = 74,993.81