Finding the Fourth Proportional to 1,291,209, 1,937,124.72 and 404,745

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,209 : 1,937,124.72 = 404,745 : x
2. Step 2: Convert to fraction form
   1,291,209/1,937,124.72 = 404,745/x
3. Step 3: Cross multiply
   1,291,209x = 1,937,124.72 × 404,745
4. Step 4: Simplify right side
   1,291,209x = 784,041,544,796.40
5. Step 5: Solve for x
   x = 784,041,544,796.40/1,291,209
6. Step 6: Final answer
   x = 607,215.06