Finding the Fourth Proportional to 288,856.08, 433,293.12 and 78,498.48

Step by Step Solution

1. Step 1: Write the proportion equation
   288,856.08 : 433,293.12 = 78,498.48 : x
2. Step 2: Convert to fraction form
   288,856.08/433,293.12 = 78,498.48/x
3. Step 3: Cross multiply
   288,856.08x = 433,293.12 × 78,498.48
4. Step 4: Simplify right side
   288,856.08x = 34,012,851,314.46
5. Step 5: Solve for x
   x = 34,012,851,314.46/288,856.08
6. Step 6: Final answer
   x = 117,750.17