Finding the Fourth Proportional to 56,970, 78,618.60 and 31,820.04

Step by Step Solution

1. Step 1: Write the proportion equation
   56,970 : 78,618.60 = 31,820.04 : x
2. Step 2: Convert to fraction form
   56,970/78,618.60 = 31,820.04/x
3. Step 3: Cross multiply
   56,970x = 78,618.60 × 31,820.04
4. Step 4: Simplify right side
   56,970x = 2,501,646,996.74
5. Step 5: Solve for x
   x = 2,501,646,996.74/56,970
6. Step 6: Final answer
   x = 43,911.66