Finding the Fourth Proportional to 77,870.30, 107,507.69 and 51,059.58

Step by Step Solution

1. Step 1: Write the proportion equation
   77,870.30 : 107,507.69 = 51,059.58 : x
2. Step 2: Convert to fraction form
   77,870.30/107,507.69 = 51,059.58/x
3. Step 3: Cross multiply
   77,870.30x = 107,507.69 × 51,059.58
4. Step 4: Simplify right side
   77,870.30x = 5,489,297,498.17
5. Step 5: Solve for x
   x = 5,489,297,498.17/77,870.30
6. Step 6: Final answer
   x = 70,492.83