Finding the Fourth Proportional to 75,036.72, 103,430.52 and 50,830.32

Step by Step Solution

1. Step 1: Write the proportion equation
   75,036.72 : 103,430.52 = 50,830.32 : x
2. Step 2: Convert to fraction form
   75,036.72/103,430.52 = 50,830.32/x
3. Step 3: Cross multiply
   75,036.72x = 103,430.52 × 50,830.32
4. Step 4: Simplify right side
   75,036.72x = 5,257,406,429.37
5. Step 5: Solve for x
   x = 5,257,406,429.37/75,036.72
6. Step 6: Final answer
   x = 70,064.45