Finding the Fourth Proportional to 712,594.52, 983,380.56 and 390,316.15

Step by Step Solution

1. Step 1: Write the proportion equation
   712,594.52 : 983,380.56 = 390,316.15 : x
2. Step 2: Convert to fraction form
   712,594.52/983,380.56 = 390,316.15/x
3. Step 3: Cross multiply
   712,594.52x = 983,380.56 × 390,316.15
4. Step 4: Simplify right side
   712,594.52x = 383,829,314,164.04
5. Step 5: Solve for x
   x = 383,829,314,164.04/712,594.52
6. Step 6: Final answer
   x = 538,636.35