Finding the Fourth Proportional to 72,165.15, 108,099.99 and 42,493.03

Step by Step Solution

1. Step 1: Write the proportion equation
   72,165.15 : 108,099.99 = 42,493.03 : x
2. Step 2: Convert to fraction form
   72,165.15/108,099.99 = 42,493.03/x
3. Step 3: Cross multiply
   72,165.15x = 108,099.99 × 42,493.03
4. Step 4: Simplify right side
   72,165.15x = 4,593,495,847.82
5. Step 5: Solve for x
   x = 4,593,495,847.82/72,165.15
6. Step 6: Final answer
   x = 63,652.55