Finding the Fourth Proportional to 90,063.51, 134,435.78 and 79,423.05

Step by Step Solution

1. Step 1: Write the proportion equation
   90,063.51 : 134,435.78 = 79,423.05 : x
2. Step 2: Convert to fraction form
   90,063.51/134,435.78 = 79,423.05/x
3. Step 3: Cross multiply
   90,063.51x = 134,435.78 × 79,423.05
4. Step 4: Simplify right side
   90,063.51x = 10,677,299,279.61
5. Step 5: Solve for x
   x = 10,677,299,279.61/90,063.51
6. Step 6: Final answer
   x = 118,553.00