Finding the Fourth Proportional to 72,321.96, 99,809.86 and 42,116.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,321.96 : 99,809.86 = 42,116.68 : x
2. Step 2: Convert to fraction form
   72,321.96/99,809.86 = 42,116.68/x
3. Step 3: Cross multiply
   72,321.96x = 99,809.86 × 42,116.68
4. Step 4: Simplify right side
   72,321.96x = 4,203,659,934.46
5. Step 5: Solve for x
   x = 4,203,659,934.46/72,321.96
6. Step 6: Final answer
   x = 58,124.25