Finding the Fourth Proportional to 1,776,499.14, 2,664,725.67 and 428,650.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,776,499.14 : 2,664,725.67 = 428,650.38 : x
2. Step 2: Convert to fraction form
   1,776,499.14/2,664,725.67 = 428,650.38/x
3. Step 3: Cross multiply
   1,776,499.14x = 2,664,725.67 × 428,650.38
4. Step 4: Simplify right side
   1,776,499.14x = 1,142,235,671,041.25
5. Step 5: Solve for x
   x = 1,142,235,671,041.25/1,776,499.14
6. Step 6: Final answer
   x = 642,970.01