Finding the Fourth Proportional to 438,390, 604,978.20 and 237,186

Step by Step Solution

1. Step 1: Write the proportion equation
   438,390 : 604,978.20 = 237,186 : x
2. Step 2: Convert to fraction form
   438,390/604,978.20 = 237,186/x
3. Step 3: Cross multiply
   438,390x = 604,978.20 × 237,186
4. Step 4: Simplify right side
   438,390x = 143,492,359,345.20
5. Step 5: Solve for x
   x = 143,492,359,345.20/438,390
6. Step 6: Final answer
   x = 327,316.68