Finding the Fourth Proportional to 402,887.59, 604,369.25 and 118,578.30

Step by Step Solution

1. Step 1: Write the proportion equation
   402,887.59 : 604,369.25 = 118,578.30 : x
2. Step 2: Convert to fraction form
   402,887.59/604,369.25 = 118,578.30/x
3. Step 3: Cross multiply
   402,887.59x = 604,369.25 × 118,578.30
4. Step 4: Simplify right side
   402,887.59x = 71,665,075,822.67
5. Step 5: Solve for x
   x = 71,665,075,822.67/402,887.59
6. Step 6: Final answer
   x = 177,878.59