Finding the Fourth Proportional to 105,114.10, 157,671.15 and 103,386.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,114.10 : 157,671.15 = 103,386.10 : x
2. Step 2: Convert to fraction form
   105,114.10/157,671.15 = 103,386.10/x
3. Step 3: Cross multiply
   105,114.10x = 157,671.15 × 103,386.10
4. Step 4: Simplify right side
   105,114.10x = 16,301,005,281.02
5. Step 5: Solve for x
   x = 16,301,005,281.02/105,114.10
6. Step 6: Final answer
   x = 155,079.15