Finding the Fourth Proportional to 702,978.95, 970,111.89 and 380,689.57

Step by Step Solution

1. Step 1: Write the proportion equation
   702,978.95 : 970,111.89 = 380,689.57 : x
2. Step 2: Convert to fraction form
   702,978.95/970,111.89 = 380,689.57/x
3. Step 3: Cross multiply
   702,978.95x = 970,111.89 × 380,689.57
4. Step 4: Simplify right side
   702,978.95x = 369,311,479,468.63
5. Step 5: Solve for x
   x = 369,311,479,468.63/702,978.95
6. Step 6: Final answer
   x = 525,352.11