Finding the Fourth Proportional to 56,634.18, 78,153 and 31,485.30

Step by Step Solution

1. Step 1: Write the proportion equation
   56,634.18 : 78,153 = 31,485.30 : x
2. Step 2: Convert to fraction form
   56,634.18/78,153 = 31,485.30/x
3. Step 3: Cross multiply
   56,634.18x = 78,153 × 31,485.30
4. Step 4: Simplify right side
   56,634.18x = 2,460,670,650.90
5. Step 5: Solve for x
   x = 2,460,670,650.90/56,634.18
6. Step 6: Final answer
   x = 43,448.51