Finding the Fourth Proportional to 56,889.98, 78,507.64 and 31,396.58

Step by Step Solution

1. Step 1: Write the proportion equation
   56,889.98 : 78,507.64 = 31,396.58 : x
2. Step 2: Convert to fraction form
   56,889.98/78,507.64 = 31,396.58/x
3. Step 3: Cross multiply
   56,889.98x = 78,507.64 × 31,396.58
4. Step 4: Simplify right side
   56,889.98x = 2,464,871,399.87
5. Step 5: Solve for x
   x = 2,464,871,399.87/56,889.98
6. Step 6: Final answer
   x = 43,326.99