Finding the Fourth Proportional to 113,015.57, 155,959.83 and 64,616.99

Step by Step Solution

1. Step 1: Write the proportion equation
   113,015.57 : 155,959.83 = 64,616.99 : x
2. Step 2: Convert to fraction form
   113,015.57/155,959.83 = 64,616.99/x
3. Step 3: Cross multiply
   113,015.57x = 155,959.83 × 64,616.99
4. Step 4: Simplify right side
   113,015.57x = 10,077,653,995.71
5. Step 5: Solve for x
   x = 10,077,653,995.71/113,015.57
6. Step 6: Final answer
   x = 89,170.50