Finding the Fourth Proportional to 112,990.16, 156,132.74 and 82,309.86

Step by Step Solution

1. Step 1: Write the proportion equation
   112,990.16 : 156,132.74 = 82,309.86 : x
2. Step 2: Convert to fraction form
   112,990.16/156,132.74 = 82,309.86/x
3. Step 3: Cross multiply
   112,990.16x = 156,132.74 × 82,309.86
4. Step 4: Simplify right side
   112,990.16x = 12,851,263,970.82
5. Step 5: Solve for x
   x = 12,851,263,970.82/112,990.16
6. Step 6: Final answer
   x = 113,737.90