Finding the Fourth Proportional to 56,889, 78,510.60 and 31,739.04

Step by Step Solution

1. Step 1: Write the proportion equation
   56,889 : 78,510.60 = 31,739.04 : x
2. Step 2: Convert to fraction form
   56,889/78,510.60 = 31,739.04/x
3. Step 3: Cross multiply
   56,889x = 78,510.60 × 31,739.04
4. Step 4: Simplify right side
   56,889x = 2,491,851,073.82
5. Step 5: Solve for x
   x = 2,491,851,073.82/56,889
6. Step 6: Final answer
   x = 43,801.98