Finding the Fourth Proportional to 421,085.96, 581,100.17 and 230,099.38

Step by Step Solution

1. Step 1: Write the proportion equation
   421,085.96 : 581,100.17 = 230,099.38 : x
2. Step 2: Convert to fraction form
   421,085.96/581,100.17 = 230,099.38/x
3. Step 3: Cross multiply
   421,085.96x = 581,100.17 × 230,099.38
4. Step 4: Simplify right side
   421,085.96x = 133,710,788,834.90
5. Step 5: Solve for x
   x = 133,710,788,834.90/421,085.96
6. Step 6: Final answer
   x = 317,537.99