Finding the Fourth Proportional to 82,990.64, 124,422.15 and 42,966.72

Step by Step Solution

1. Step 1: Write the proportion equation
   82,990.64 : 124,422.15 = 42,966.72 : x
2. Step 2: Convert to fraction form
   82,990.64/124,422.15 = 42,966.72/x
3. Step 3: Cross multiply
   82,990.64x = 124,422.15 × 42,966.72
4. Step 4: Simplify right side
   82,990.64x = 5,346,011,680.85
5. Step 5: Solve for x
   x = 5,346,011,680.85/82,990.64
6. Step 6: Final answer
   x = 64,417.04