Finding the Fourth Proportional to 56,288, 77,670.72 and 31,134.08

Step by Step Solution

1. Step 1: Write the proportion equation
   56,288 : 77,670.72 = 31,134.08 : x
2. Step 2: Convert to fraction form
   56,288/77,670.72 = 31,134.08/x
3. Step 3: Cross multiply
   56,288x = 77,670.72 × 31,134.08
4. Step 4: Simplify right side
   56,288x = 2,418,206,410.14
5. Step 5: Solve for x
   x = 2,418,206,410.14/56,288
6. Step 6: Final answer
   x = 42,961.31