Finding the Fourth Proportional to 123,587.10, 173,415.60 and 123,587.10

Step by Step Solution

1. Step 1: Write the proportion equation
   123,587.10 : 173,415.60 = 123,587.10 : x
2. Step 2: Convert to fraction form
   123,587.10/173,415.60 = 123,587.10/x
3. Step 3: Cross multiply
   123,587.10x = 173,415.60 × 123,587.10
4. Step 4: Simplify right side
   123,587.10x = 21,431,931,098.76
5. Step 5: Solve for x
   x = 21,431,931,098.76/123,587.10
6. Step 6: Final answer
   x = 173,415.60