Finding the Fourth Proportional to 72,300.35, 99,774.98 and 42,103.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,300.35 : 99,774.98 = 42,103.28 : x
2. Step 2: Convert to fraction form
   72,300.35/99,774.98 = 42,103.28/x
3. Step 3: Cross multiply
   72,300.35x = 99,774.98 × 42,103.28
4. Step 4: Simplify right side
   72,300.35x = 4,200,853,210.54
5. Step 5: Solve for x
   x = 4,200,853,210.54/72,300.35
6. Step 6: Final answer
   x = 58,102.81