Finding the Fourth Proportional to 288,870.82, 433,305.02 and 78,508.16

Step by Step Solution

1. Step 1: Write the proportion equation
   288,870.82 : 433,305.02 = 78,508.16 : x
2. Step 2: Convert to fraction form
   288,870.82/433,305.02 = 78,508.16/x
3. Step 3: Cross multiply
   288,870.82x = 433,305.02 × 78,508.16
4. Step 4: Simplify right side
   288,870.82x = 34,017,979,838.96
5. Step 5: Solve for x
   x = 34,017,979,838.96/288,870.82
6. Step 6: Final answer
   x = 117,761.91