Finding the Fourth Proportional to 103,775.60, 155,661.80 and 70,412.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,775.60 : 155,661.80 = 70,412.72 : x
2. Step 2: Convert to fraction form
   103,775.60/155,661.80 = 70,412.72/x
3. Step 3: Cross multiply
   103,775.60x = 155,661.80 × 70,412.72
4. Step 4: Simplify right side
   103,775.60x = 10,960,570,738.10
5. Step 5: Solve for x
   x = 10,960,570,738.10/103,775.60
6. Step 6: Final answer
   x = 105,617.99