Finding the Third Proportional to 129,522 and 278,726.63

Step by Step Solution

1. Step 1: Write the proportion equation
   129,522 : 278,726.63 = 278,726.63 : x
2. Step 2: Convert to fraction form
   129,522/278,726.63 = 278,726.63/x
3. Step 3: Cross multiply
   129,522x = 278,726.63 × 278,726.63
4. Step 4: Simplify right side
   129,522x = 77,688,531,483.89
5. Step 5: Solve for x
   x = 77,688,531,483.89/129,522
6. Step 6: Final answer
   x = 599,809.54