Finding the Fourth Proportional to 1,145,427.68, 1,580,646.72 and 636,162.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145,427.68 : 1,580,646.72 = 636,162.72 : x
2. Step 2: Convert to fraction form
   1,145,427.68/1,580,646.72 = 636,162.72/x
3. Step 3: Cross multiply
   1,145,427.68x = 1,580,646.72 × 636,162.72
4. Step 4: Simplify right side
   1,145,427.68x = 1,005,548,516,754.28
5. Step 5: Solve for x
   x = 1,005,548,516,754.28/1,145,427.68
6. Step 6: Final answer
   x = 877,880.41