Finding the Fourth Proportional to 72,389.48, 99,762.18 and 56,448.68

Step by Step Solution

1. Step 1: Write the proportion equation
   72,389.48 : 99,762.18 = 56,448.68 : x
2. Step 2: Convert to fraction form
   72,389.48/99,762.18 = 56,448.68/x
3. Step 3: Cross multiply
   72,389.48x = 99,762.18 × 56,448.68
4. Step 4: Simplify right side
   72,389.48x = 5,631,443,374.92
5. Step 5: Solve for x
   x = 5,631,443,374.92/72,389.48
6. Step 6: Final answer
   x = 77,793.67