Finding the Fourth Proportional to 705,792, 973,992.96 and 387,840

Step by Step Solution

1. Step 1: Write the proportion equation
   705,792 : 973,992.96 = 387,840 : x
2. Step 2: Convert to fraction form
   705,792/973,992.96 = 387,840/x
3. Step 3: Cross multiply
   705,792x = 973,992.96 × 387,840
4. Step 4: Simplify right side
   705,792x = 377,753,429,606.40
5. Step 5: Solve for x
   x = 377,753,429,606.40/705,792
6. Step 6: Final answer
   x = 535,219.20