Finding the Fourth Proportional to 257,373.86, 386,112.42 and 88,900.34

Step by Step Solution

1. Step 1: Write the proportion equation
   257,373.86 : 386,112.42 = 88,900.34 : x
2. Step 2: Convert to fraction form
   257,373.86/386,112.42 = 88,900.34/x
3. Step 3: Cross multiply
   257,373.86x = 386,112.42 × 88,900.34
4. Step 4: Simplify right side
   257,373.86x = 34,325,523,485.66
5. Step 5: Solve for x
   x = 34,325,523,485.66/257,373.86
6. Step 6: Final answer
   x = 133,368.34