Finding the Fourth Proportional to 103,423.89, 154,834.50 and 76,887.48

Step by Step Solution

1. Step 1: Write the proportion equation
   103,423.89 : 154,834.50 = 76,887.48 : x
2. Step 2: Convert to fraction form
   103,423.89/154,834.50 = 76,887.48/x
3. Step 3: Cross multiply
   103,423.89x = 154,834.50 × 76,887.48
4. Step 4: Simplify right side
   103,423.89x = 11,904,834,522.06
5. Step 5: Solve for x
   x = 11,904,834,522.06/103,423.89
6. Step 6: Final answer
   x = 115,107.20