Finding the Third Proportional to 28,458.75 and 42,779.81

Step by Step Solution

1. Step 1: Write the proportion equation
   28,458.75 : 42,779.81 = 42,779.81 : x
2. Step 2: Convert to fraction form
   28,458.75/42,779.81 = 42,779.81/x
3. Step 3: Cross multiply
   28,458.75x = 42,779.81 × 42,779.81
4. Step 4: Simplify right side
   28,458.75x = 1,830,112,357.54
5. Step 5: Solve for x
   x = 1,830,112,357.54/28,458.75
6. Step 6: Final answer
   x = 64,307.55