Finding the Fourth Proportional to 72,875.69, 109,313.55 and 56,259.98

Step by Step Solution

1. Step 1: Write the proportion equation
   72,875.69 : 109,313.55 = 56,259.98 : x
2. Step 2: Convert to fraction form
   72,875.69/109,313.55 = 56,259.98/x
3. Step 3: Cross multiply
   72,875.69x = 109,313.55 × 56,259.98
4. Step 4: Simplify right side
   72,875.69x = 6,149,978,136.73
5. Step 5: Solve for x
   x = 6,149,978,136.73/72,875.69
6. Step 6: Final answer
   x = 84,389.98