Finding the Fourth Proportional to 151,760.16, 209,429.76 and 83,775.90

Step by Step Solution

1. Step 1: Write the proportion equation
   151,760.16 : 209,429.76 = 83,775.90 : x
2. Step 2: Convert to fraction form
   151,760.16/209,429.76 = 83,775.90/x
3. Step 3: Cross multiply
   151,760.16x = 209,429.76 × 83,775.90
4. Step 4: Simplify right side
   151,760.16x = 17,545,166,630.78
5. Step 5: Solve for x
   x = 17,545,166,630.78/151,760.16
6. Step 6: Final answer
   x = 115,611.15