Finding the Fourth Proportional to 116,402.64, 174,307.48 and 76,839

Step by Step Solution

1. Step 1: Write the proportion equation
   116,402.64 : 174,307.48 = 76,839 : x
2. Step 2: Convert to fraction form
   116,402.64/174,307.48 = 76,839/x
3. Step 3: Cross multiply
   116,402.64x = 174,307.48 × 76,839
4. Step 4: Simplify right side
   116,402.64x = 13,393,612,455.72
5. Step 5: Solve for x
   x = 13,393,612,455.72/116,402.64
6. Step 6: Final answer
   x = 115,062.79