Finding the Fourth Proportional to 56,308.56, 77,706.36 and 31,158

Step by Step Solution

1. Step 1: Write the proportion equation
   56,308.56 : 77,706.36 = 31,158 : x
2. Step 2: Convert to fraction form
   56,308.56/77,706.36 = 31,158/x
3. Step 3: Cross multiply
   56,308.56x = 77,706.36 × 31,158
4. Step 4: Simplify right side
   56,308.56x = 2,421,174,764.88
5. Step 5: Solve for x
   x = 2,421,174,764.88/56,308.56
6. Step 6: Final answer
   x = 42,998.34