Finding the Fourth Proportional to 82,046,139.21, 113,258,534.63 and 51,121,587.42

Step by Step Solution

1. Step 1: Write the proportion equation
   82,046,139.21 : 113,258,534.63 = 51,121,587.42 : x
2. Step 2: Convert to fraction form
   82,046,139.21/113,258,534.63 = 51,121,587.42/x
3. Step 3: Cross multiply
   82,046,139.21x = 113,258,534.63 × 51,121,587.42
4. Step 4: Simplify right side
   82,046,139.21x = 5,789,956,079,148,642
5. Step 5: Solve for x
   x = 5,789,956,079,148,642/82,046,139.21
6. Step 6: Final answer
   x = 70,569,512.90