Finding the Fourth Proportional to 47,054.40, 64,938.48 and 31,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   47,054.40 : 64,938.48 = 31,111.20 : x
2. Step 2: Convert to fraction form
   47,054.40/64,938.48 = 31,111.20/x
3. Step 3: Cross multiply
   47,054.40x = 64,938.48 × 31,111.20
4. Step 4: Simplify right side
   47,054.40x = 2,020,314,038.98
5. Step 5: Solve for x
   x = 2,020,314,038.98/47,054.40
6. Step 6: Final answer
   x = 42,935.71