Finding the Fourth Proportional to 70,875.18, 106,298.16 and 31,407.12

Step by Step Solution

1. Step 1: Write the proportion equation
   70,875.18 : 106,298.16 = 31,407.12 : x
2. Step 2: Convert to fraction form
   70,875.18/106,298.16 = 31,407.12/x
3. Step 3: Cross multiply
   70,875.18x = 106,298.16 × 31,407.12
4. Step 4: Simplify right side
   70,875.18x = 3,338,519,066.90
5. Step 5: Solve for x
   x = 3,338,519,066.90/70,875.18
6. Step 6: Final answer
   x = 47,104.21