Finding the Fourth Proportional to 1,275,789.42, 1,913,737.56 and 476,990.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,275,789.42 : 1,913,737.56 = 476,990.10 : x
2. Step 2: Convert to fraction form
   1,275,789.42/1,913,737.56 = 476,990.10/x
3. Step 3: Cross multiply
   1,275,789.42x = 1,913,737.56 × 476,990.10
4. Step 4: Simplify right side
   1,275,789.42x = 912,833,870,118.16
5. Step 5: Solve for x
   x = 912,833,870,118.16/1,275,789.42
6. Step 6: Final answer
   x = 715,505.13