Finding the Fourth Proportional to 123,037.40, 172,369 and 123,037.40

Step by Step Solution

1. Step 1: Write the proportion equation
   123,037.40 : 172,369 = 123,037.40 : x
2. Step 2: Convert to fraction form
   123,037.40/172,369 = 123,037.40/x
3. Step 3: Cross multiply
   123,037.40x = 172,369 × 123,037.40
4. Step 4: Simplify right side
   123,037.40x = 21,207,833,600.60
5. Step 5: Solve for x
   x = 21,207,833,600.60/123,037.40
6. Step 6: Final answer
   x = 172,369