Finding the Fourth Proportional to 56,507.59, 77,980.94 and 31,357.51

Step by Step Solution

1. Step 1: Write the proportion equation
   56,507.59 : 77,980.94 = 31,357.51 : x
2. Step 2: Convert to fraction form
   56,507.59/77,980.94 = 31,357.51/x
3. Step 3: Cross multiply
   56,507.59x = 77,980.94 × 31,357.51
4. Step 4: Simplify right side
   56,507.59x = 2,445,288,105.86
5. Step 5: Solve for x
   x = 2,445,288,105.86/56,507.59
6. Step 6: Final answer
   x = 43,273.62