Finding the Fourth Proportional to 103,700.10, 155,422.15 and 70,420.10

Step by Step Solution

1. Step 1: Write the proportion equation
   103,700.10 : 155,422.15 = 70,420.10 : x
2. Step 2: Convert to fraction form
   103,700.10/155,422.15 = 70,420.10/x
3. Step 3: Cross multiply
   103,700.10x = 155,422.15 × 70,420.10
4. Step 4: Simplify right side
   103,700.10x = 10,944,843,345.22
5. Step 5: Solve for x
   x = 10,944,843,345.22/103,700.10
6. Step 6: Final answer
   x = 105,543.23