Finding the Fourth Proportional to 56,131.04, 77,460.34 and 30,980

Step by Step Solution

1. Step 1: Write the proportion equation
   56,131.04 : 77,460.34 = 30,980 : x
2. Step 2: Convert to fraction form
   56,131.04/77,460.34 = 30,980/x
3. Step 3: Cross multiply
   56,131.04x = 77,460.34 × 30,980
4. Step 4: Simplify right side
   56,131.04x = 2,399,721,333.20
5. Step 5: Solve for x
   x = 2,399,721,333.20/56,131.04
6. Step 6: Final answer
   x = 42,752.13