Finding the Fourth Proportional to 947,856.32, 1,308,041.82 and 518,138.20

Step by Step Solution

1. Step 1: Write the proportion equation
   947,856.32 : 1,308,041.82 = 518,138.20 : x
2. Step 2: Convert to fraction form
   947,856.32/1,308,041.82 = 518,138.20/x
3. Step 3: Cross multiply
   947,856.32x = 1,308,041.82 × 518,138.20
4. Step 4: Simplify right side
   947,856.32x = 677,746,434,139.52
5. Step 5: Solve for x
   x = 677,746,434,139.52/947,856.32
6. Step 6: Final answer
   x = 715,030.77