Finding the Third Proportional to 130,488.50 and 278,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   130,488.50 : 278,068.50 = 278,068.50 : x
2. Step 2: Convert to fraction form
   130,488.50/278,068.50 = 278,068.50/x
3. Step 3: Cross multiply
   130,488.50x = 278,068.50 × 278,068.50
4. Step 4: Simplify right side
   130,488.50x = 77,322,090,692.25
5. Step 5: Solve for x
   x = 77,322,090,692.25/130,488.50
6. Step 6: Final answer
   x = 592,558.66