Finding the Fourth Proportional to 947,900.68, 1,308,105.54 and 518,185.96

Step by Step Solution

1. Step 1: Write the proportion equation
   947,900.68 : 1,308,105.54 = 518,185.96 : x
2. Step 2: Convert to fraction form
   947,900.68/1,308,105.54 = 518,185.96/x
3. Step 3: Cross multiply
   947,900.68x = 1,308,105.54 × 518,185.96
4. Step 4: Simplify right side
   947,900.68x = 677,841,925,026.22
5. Step 5: Solve for x
   x = 677,841,925,026.22/947,900.68
6. Step 6: Final answer
   x = 715,098.05