Finding the Fourth Proportional to 56,172.48, 77,514.12 and 31,020

Step by Step Solution

1. Step 1: Write the proportion equation
   56,172.48 : 77,514.12 = 31,020 : x
2. Step 2: Convert to fraction form
   56,172.48/77,514.12 = 31,020/x
3. Step 3: Cross multiply
   56,172.48x = 77,514.12 × 31,020
4. Step 4: Simplify right side
   56,172.48x = 2,404,488,002.40
5. Step 5: Solve for x
   x = 2,404,488,002.40/56,172.48
6. Step 6: Final answer
   x = 42,805.44