Finding the Fourth Proportional to 111,580.32, 153,983.52 and 61,280.40

Step by Step Solution

1. Step 1: Write the proportion equation
   111,580.32 : 153,983.52 = 61,280.40 : x
2. Step 2: Convert to fraction form
   111,580.32/153,983.52 = 61,280.40/x
3. Step 3: Cross multiply
   111,580.32x = 153,983.52 × 61,280.40
4. Step 4: Simplify right side
   111,580.32x = 9,436,171,699.01
5. Step 5: Solve for x
   x = 9,436,171,699.01/111,580.32
6. Step 6: Final answer
   x = 84,568.42