Finding the Fourth Proportional to 56,699.78, 78,245.70 and 31,549.28

Step by Step Solution

1. Step 1: Write the proportion equation
   56,699.78 : 78,245.70 = 31,549.28 : x
2. Step 2: Convert to fraction form
   56,699.78/78,245.70 = 31,549.28/x
3. Step 3: Cross multiply
   56,699.78x = 78,245.70 × 31,549.28
4. Step 4: Simplify right side
   56,699.78x = 2,468,595,498.10
5. Step 5: Solve for x
   x = 2,468,595,498.10/56,699.78
6. Step 6: Final answer
   x = 43,538.01