Finding the Fourth Proportional to 72,297.35, 99,770.84 and 42,100.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,297.35 : 99,770.84 = 42,100.28 : x
2. Step 2: Convert to fraction form
   72,297.35/99,770.84 = 42,100.28/x
3. Step 3: Cross multiply
   72,297.35x = 99,770.84 × 42,100.28
4. Step 4: Simplify right side
   72,297.35x = 4,200,379,590.48
5. Step 5: Solve for x
   x = 4,200,379,590.48/72,297.35
6. Step 6: Final answer
   x = 58,098.67