Finding the Fourth Proportional to 931,085.94, 1,396,374.02 and 257,006.10

Step by Step Solution

1. Step 1: Write the proportion equation
   931,085.94 : 1,396,374.02 = 257,006.10 : x
2. Step 2: Convert to fraction form
   931,085.94/1,396,374.02 = 257,006.10/x
3. Step 3: Cross multiply
   931,085.94x = 1,396,374.02 × 257,006.10
4. Step 4: Simplify right side
   931,085.94x = 358,876,636,909.52
5. Step 5: Solve for x
   x = 358,876,636,909.52/931,085.94
6. Step 6: Final answer
   x = 385,438.79