Finding the Fourth Proportional to 56,213.12, 77,571.06 and 31,061

Step by Step Solution

1. Step 1: Write the proportion equation
   56,213.12 : 77,571.06 = 31,061 : x
2. Step 2: Convert to fraction form
   56,213.12/77,571.06 = 31,061/x
3. Step 3: Cross multiply
   56,213.12x = 77,571.06 × 31,061
4. Step 4: Simplify right side
   56,213.12x = 2,409,434,694.66
5. Step 5: Solve for x
   x = 2,409,434,694.66/56,213.12
6. Step 6: Final answer
   x = 42,862.50