Finding the Fourth Proportional to 109,019.28, 150,508.62 and 70,813.20

Step by Step Solution

1. Step 1: Write the proportion equation
   109,019.28 : 150,508.62 = 70,813.20 : x
2. Step 2: Convert to fraction form
   109,019.28/150,508.62 = 70,813.20/x
3. Step 3: Cross multiply
   109,019.28x = 150,508.62 × 70,813.20
4. Step 4: Simplify right side
   109,019.28x = 10,657,997,009.78
5. Step 5: Solve for x
   x = 10,657,997,009.78/109,019.28
6. Step 6: Final answer
   x = 97,762.50