Finding the Fourth Proportional to 257,707.41, 386,468.50 and 89,181.98

Step by Step Solution

1. Step 1: Write the proportion equation
   257,707.41 : 386,468.50 = 89,181.98 : x
2. Step 2: Convert to fraction form
   257,707.41/386,468.50 = 89,181.98/x
3. Step 3: Cross multiply
   257,707.41x = 386,468.50 × 89,181.98
4. Step 4: Simplify right side
   257,707.41x = 34,466,026,037.63
5. Step 5: Solve for x
   x = 34,466,026,037.63/257,707.41
6. Step 6: Final answer
   x = 133,740.92