Finding the Fourth Proportional to 72,358.76, 99,855.39 and 42,164.79

Step by Step Solution

1. Step 1: Write the proportion equation
   72,358.76 : 99,855.39 = 42,164.79 : x
2. Step 2: Convert to fraction form
   72,358.76/99,855.39 = 42,164.79/x
3. Step 3: Cross multiply
   72,358.76x = 99,855.39 × 42,164.79
4. Step 4: Simplify right side
   72,358.76x = 4,210,381,549.72
5. Step 5: Solve for x
   x = 4,210,381,549.72/72,358.76
6. Step 6: Final answer
   x = 58,187.59