Finding the Fourth Proportional to 56,298, 77,691.78 and 31,148.04

Step by Step Solution

1. Step 1: Write the proportion equation
   56,298 : 77,691.78 = 31,148.04 : x
2. Step 2: Convert to fraction form
   56,298/77,691.78 = 31,148.04/x
3. Step 3: Cross multiply
   56,298x = 77,691.78 × 31,148.04
4. Step 4: Simplify right side
   56,298x = 2,419,946,671.11
5. Step 5: Solve for x
   x = 2,419,946,671.11/56,298
6. Step 6: Final answer
   x = 42,984.59