Finding the Fourth Proportional to 56,577.18, 78,076.56 and 31,085.19

Step by Step Solution

1. Step 1: Write the proportion equation
   56,577.18 : 78,076.56 = 31,085.19 : x
2. Step 2: Convert to fraction form
   56,577.18/78,076.56 = 31,085.19/x
3. Step 3: Cross multiply
   56,577.18x = 78,076.56 × 31,085.19
4. Step 4: Simplify right side
   56,577.18x = 2,427,024,863.45
5. Step 5: Solve for x
   x = 2,427,024,863.45/56,577.18
6. Step 6: Final answer
   x = 42,897.59