Finding the Fourth Proportional to 2,077.12, 3,117.05 and 981.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.12 : 3,117.05 = 981.57 : x
2. Step 2: Convert to fraction form
   2,077.12/3,117.05 = 981.57/x
3. Step 3: Cross multiply
   2,077.12x = 3,117.05 × 981.57
4. Step 4: Simplify right side
   2,077.12x = 3,059,602.77
5. Step 5: Solve for x
   x = 3,059,602.77/2,077.12
6. Step 6: Final answer
   x = 1,473.00