Finding the Fourth Proportional to 816,111.28, 1,224,045.96 and 436,564.72

Step by Step Solution

1. Step 1: Write the proportion equation
   816,111.28 : 1,224,045.96 = 436,564.72 : x
2. Step 2: Convert to fraction form
   816,111.28/1,224,045.96 = 436,564.72/x
3. Step 3: Cross multiply
   816,111.28x = 1,224,045.96 × 436,564.72
4. Step 4: Simplify right side
   816,111.28x = 534,375,281,794.53
5. Step 5: Solve for x
   x = 534,375,281,794.53/816,111.28
6. Step 6: Final answer
   x = 654,782.37