Finding the Fourth Proportional to 705,186, 973,156.68 and 403,380

Step by Step Solution

1. Step 1: Write the proportion equation
   705,186 : 973,156.68 = 403,380 : x
2. Step 2: Convert to fraction form
   705,186/973,156.68 = 403,380/x
3. Step 3: Cross multiply
   705,186x = 973,156.68 × 403,380
4. Step 4: Simplify right side
   705,186x = 392,551,941,578.40
5. Step 5: Solve for x
   x = 392,551,941,578.40/705,186
6. Step 6: Final answer
   x = 556,664.40