Finding the Fourth Proportional to 56,781.04, 78,356.82 and 31,630

Step by Step Solution

1. Step 1: Write the proportion equation
   56,781.04 : 78,356.82 = 31,630 : x
2. Step 2: Convert to fraction form
   56,781.04/78,356.82 = 31,630/x
3. Step 3: Cross multiply
   56,781.04x = 78,356.82 × 31,630
4. Step 4: Simplify right side
   56,781.04x = 2,478,426,216.60
5. Step 5: Solve for x
   x = 2,478,426,216.60/56,781.04
6. Step 6: Final answer
   x = 43,648.83