Finding the Fourth Proportional to 90,071.84, 134,448.18 and 79,431.41

Step by Step Solution

1. Step 1: Write the proportion equation
   90,071.84 : 134,448.18 = 79,431.41 : x
2. Step 2: Convert to fraction form
   90,071.84/134,448.18 = 79,431.41/x
3. Step 3: Cross multiply
   90,071.84x = 134,448.18 × 79,431.41
4. Step 4: Simplify right side
   90,071.84x = 10,679,407,837.09
5. Step 5: Solve for x
   x = 10,679,407,837.09/90,071.84
6. Step 6: Final answer
   x = 118,565.45