Finding the Fourth Proportional to 56,636.73, 78,160.69 and 31,145.02

Step by Step Solution

1. Step 1: Write the proportion equation
   56,636.73 : 78,160.69 = 31,145.02 : x
2. Step 2: Convert to fraction form
   56,636.73/78,160.69 = 31,145.02/x
3. Step 3: Cross multiply
   56,636.73x = 78,160.69 × 31,145.02
4. Step 4: Simplify right side
   56,636.73x = 2,434,316,253.26
5. Step 5: Solve for x
   x = 2,434,316,253.26/56,636.73
6. Step 6: Final answer
   x = 42,981.23