Finding the Fourth Proportional to 112,780.55, 155,642.33 and 64,395.59

Step by Step Solution

1. Step 1: Write the proportion equation
   112,780.55 : 155,642.33 = 64,395.59 : x
2. Step 2: Convert to fraction form
   112,780.55/155,642.33 = 64,395.59/x
3. Step 3: Cross multiply
   112,780.55x = 155,642.33 × 64,395.59
4. Step 4: Simplify right side
   112,780.55x = 10,022,679,052.10
5. Step 5: Solve for x
   x = 10,022,679,052.10/112,780.55
6. Step 6: Final answer
   x = 88,868.86