Finding the Fourth Proportional to 712,610.41, 1,069,019.96 and 207,105.72

Step by Step Solution

1. Step 1: Write the proportion equation
   712,610.41 : 1,069,019.96 = 207,105.72 : x
2. Step 2: Convert to fraction form
   712,610.41/1,069,019.96 = 207,105.72/x
3. Step 3: Cross multiply
   712,610.41x = 1,069,019.96 × 207,105.72
4. Step 4: Simplify right side
   712,610.41x = 221,400,148,510.17
5. Step 5: Solve for x
   x = 221,400,148,510.17/712,610.41
6. Step 6: Final answer
   x = 310,688.91