Finding the Fourth Proportional to 151,390.57, 208,917.98 and 83,405.95

Step by Step Solution

1. Step 1: Write the proportion equation
   151,390.57 : 208,917.98 = 83,405.95 : x
2. Step 2: Convert to fraction form
   151,390.57/208,917.98 = 83,405.95/x
3. Step 3: Cross multiply
   151,390.57x = 208,917.98 × 83,405.95
4. Step 4: Simplify right side
   151,390.57x = 17,425,003,611.75
5. Step 5: Solve for x
   x = 17,425,003,611.75/151,390.57
6. Step 6: Final answer
   x = 115,099.66