Finding the Fourth Proportional to 72,355.96, 99,850.35 and 42,146.20

Step by Step Solution

1. Step 1: Write the proportion equation
   72,355.96 : 99,850.35 = 42,146.20 : x
2. Step 2: Convert to fraction form
   72,355.96/99,850.35 = 42,146.20/x
3. Step 3: Cross multiply
   72,355.96x = 99,850.35 × 42,146.20
4. Step 4: Simplify right side
   72,355.96x = 4,208,312,821.17
5. Step 5: Solve for x
   x = 4,208,312,821.17/72,355.96
6. Step 6: Final answer
   x = 58,161.25