Finding the Fourth Proportional to 258,151.34, 387,139.68 and 98,189.30

Step by Step Solution

1. Step 1: Write the proportion equation
   258,151.34 : 387,139.68 = 98,189.30 : x
2. Step 2: Convert to fraction form
   258,151.34/387,139.68 = 98,189.30/x
3. Step 3: Cross multiply
   258,151.34x = 387,139.68 × 98,189.30
4. Step 4: Simplify right side
   258,151.34x = 38,012,974,181.42
5. Step 5: Solve for x
   x = 38,012,974,181.42/258,151.34
6. Step 6: Final answer
   x = 147,250.73