Finding the Fourth Proportional to 421,499.35, 581,677.59 and 230,525.02

Step by Step Solution

1. Step 1: Write the proportion equation
   421,499.35 : 581,677.59 = 230,525.02 : x
2. Step 2: Convert to fraction form
   421,499.35/581,677.59 = 230,525.02/x
3. Step 3: Cross multiply
   421,499.35x = 581,677.59 × 230,525.02
4. Step 4: Simplify right side
   421,499.35x = 134,091,238,068.30
5. Step 5: Solve for x
   x = 134,091,238,068.30/421,499.35
6. Step 6: Final answer
   x = 318,129.17