Finding the Fourth Proportional to 112,412.68, 155,160.78 and 64,681.41

Step by Step Solution

1. Step 1: Write the proportion equation
   112,412.68 : 155,160.78 = 64,681.41 : x
2. Step 2: Convert to fraction form
   112,412.68/155,160.78 = 64,681.41/x
3. Step 3: Cross multiply
   112,412.68x = 155,160.78 × 64,681.41
4. Step 4: Simplify right side
   112,412.68x = 10,036,018,027.10
5. Step 5: Solve for x
   x = 10,036,018,027.10/112,412.68
6. Step 6: Final answer
   x = 89,278.34