Finding the Fourth Proportional to 1,075,978.49, 1,484,404.58 and 640,308.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,075,978.49 : 1,484,404.58 = 640,308.51 : x
2. Step 2: Convert to fraction form
   1,075,978.49/1,484,404.58 = 640,308.51/x
3. Step 3: Cross multiply
   1,075,978.49x = 1,484,404.58 × 640,308.51
4. Step 4: Simplify right side
   1,075,978.49x = 950,476,886,457.75
5. Step 5: Solve for x
   x = 950,476,886,457.75/1,075,978.49
6. Step 6: Final answer
   x = 883,360.49