Finding the Fourth Proportional to 702,978.16, 970,105.04 and 380,680.88

Step by Step Solution

1. Step 1: Write the proportion equation
   702,978.16 : 970,105.04 = 380,680.88 : x
2. Step 2: Convert to fraction form
   702,978.16/970,105.04 = 380,680.88/x
3. Step 3: Cross multiply
   702,978.16x = 970,105.04 × 380,680.88
4. Step 4: Simplify right side
   702,978.16x = 369,300,440,319.64
5. Step 5: Solve for x
   x = 369,300,440,319.64/702,978.16
6. Step 6: Final answer
   x = 525,337.00