Finding the Fourth Proportional to 931,607.31, 1,397,333.04 and 257,696.91

Step by Step Solution

1. Step 1: Write the proportion equation
   931,607.31 : 1,397,333.04 = 257,696.91 : x
2. Step 2: Convert to fraction form
   931,607.31/1,397,333.04 = 257,696.91/x
3. Step 3: Cross multiply
   931,607.31x = 1,397,333.04 × 257,696.91
4. Step 4: Simplify right side
   931,607.31x = 360,088,406,648.91
5. Step 5: Solve for x
   x = 360,088,406,648.91/931,607.31
6. Step 6: Final answer
   x = 386,523.81