Finding the Fourth Proportional to 69,026.88, 103,591.76 and 51,298.40

Step by Step Solution

1. Step 1: Write the proportion equation
   69,026.88 : 103,591.76 = 51,298.40 : x
2. Step 2: Convert to fraction form
   69,026.88/103,591.76 = 51,298.40/x
3. Step 3: Cross multiply
   69,026.88x = 103,591.76 × 51,298.40
4. Step 4: Simplify right side
   69,026.88x = 5,314,091,541.18
5. Step 5: Solve for x
   x = 5,314,091,541.18/69,026.88
6. Step 6: Final answer
   x = 76,985.83