Finding the Fourth Proportional to 56,636, 78,157.77 and 31,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   56,636 : 78,157.77 = 31,485.50 : x
2. Step 2: Convert to fraction form
   56,636/78,157.77 = 31,485.50/x
3. Step 3: Cross multiply
   56,636x = 78,157.77 × 31,485.50
4. Step 4: Simplify right side
   56,636x = 2,460,836,467.34
5. Step 5: Solve for x
   x = 2,460,836,467.34/56,636
6. Step 6: Final answer
   x = 43,450.04