Finding the Fourth Proportional to 666,181, 919,329.78 and 364,375

Step by Step Solution

1. Step 1: Write the proportion equation
   666,181 : 919,329.78 = 364,375 : x
2. Step 2: Convert to fraction form
   666,181/919,329.78 = 364,375/x
3. Step 3: Cross multiply
   666,181x = 919,329.78 × 364,375
4. Step 4: Simplify right side
   666,181x = 334,980,788,587.50
5. Step 5: Solve for x
   x = 334,980,788,587.50/666,181
6. Step 6: Final answer
   x = 502,837.50