Finding the Fourth Proportional to 72,302.58, 99,707.46 and 56,381.22

Step by Step Solution

1. Step 1: Write the proportion equation
   72,302.58 : 99,707.46 = 56,381.22 : x
2. Step 2: Convert to fraction form
   72,302.58/99,707.46 = 56,381.22/x
3. Step 3: Cross multiply
   72,302.58x = 99,707.46 × 56,381.22
4. Step 4: Simplify right side
   72,302.58x = 5,621,628,237.90
5. Step 5: Solve for x
   x = 5,621,628,237.90/72,302.58
6. Step 6: Final answer
   x = 77,751.42