Finding the Fourth Proportional to 56,930.18, 78,561.63 and 31,436.10

Step by Step Solution

1. Step 1: Write the proportion equation
   56,930.18 : 78,561.63 = 31,436.10 : x
2. Step 2: Convert to fraction form
   56,930.18/78,561.63 = 31,436.10/x
3. Step 3: Cross multiply
   56,930.18x = 78,561.63 × 31,436.10
4. Step 4: Simplify right side
   56,930.18x = 2,469,671,256.84
5. Step 5: Solve for x
   x = 2,469,671,256.84/56,930.18
6. Step 6: Final answer
   x = 43,380.71