Finding the Fourth Proportional to 72,300.32, 99,773.28 and 40,469.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,300.32 : 99,773.28 = 40,469.12 : x
2. Step 2: Convert to fraction form
   72,300.32/99,773.28 = 40,469.12/x
3. Step 3: Cross multiply
   72,300.32x = 99,773.28 × 40,469.12
4. Step 4: Simplify right side
   72,300.32x = 4,037,736,841.11
5. Step 5: Solve for x
   x = 4,037,736,841.11/72,300.32
6. Step 6: Final answer
   x = 55,846.74