Finding the Fourth Proportional to 1,231,498.10, 1,699,496.22 and 687,615.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,231,498.10 : 1,699,496.22 = 687,615.50 : x
2. Step 2: Convert to fraction form
   1,231,498.10/1,699,496.22 = 687,615.50/x
3. Step 3: Cross multiply
   1,231,498.10x = 1,699,496.22 × 687,615.50
4. Step 4: Simplify right side
   1,231,498.10x = 1,168,599,943,063.41
5. Step 5: Solve for x
   x = 1,168,599,943,063.41/1,231,498.10
6. Step 6: Final answer
   x = 948,925.49