Finding the Third Proportional to 59,283 and 128,407.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,283 : 128,407.50 = 128,407.50 : x
2. Step 2: Convert to fraction form
   59,283/128,407.50 = 128,407.50/x
3. Step 3: Cross multiply
   59,283x = 128,407.50 × 128,407.50
4. Step 4: Simplify right side
   59,283x = 16,488,486,056.25
5. Step 5: Solve for x
   x = 16,488,486,056.25/59,283
6. Step 6: Final answer
   x = 278,131.78