Finding the Fourth Proportional to 103,638.78, 155,456.43 and 46,681.01

Step by Step Solution

1. Step 1: Write the proportion equation
   103,638.78 : 155,456.43 = 46,681.01 : x
2. Step 2: Convert to fraction form
   103,638.78/155,456.43 = 46,681.01/x
3. Step 3: Cross multiply
   103,638.78x = 155,456.43 × 46,681.01
4. Step 4: Simplify right side
   103,638.78x = 7,256,862,561.17
5. Step 5: Solve for x
   x = 7,256,862,561.17/103,638.78
6. Step 6: Final answer
   x = 70,020.72