Finding the Fourth Proportional to 191,378.78, 287,109.69 and 58,255.58

Step by Step Solution

1. Step 1: Write the proportion equation
   191,378.78 : 287,109.69 = 58,255.58 : x
2. Step 2: Convert to fraction form
   191,378.78/287,109.69 = 58,255.58/x
3. Step 3: Cross multiply
   191,378.78x = 287,109.69 × 58,255.58
4. Step 4: Simplify right side
   191,378.78x = 16,725,739,787.74
5. Step 5: Solve for x
   x = 16,725,739,787.74/191,378.78
6. Step 6: Final answer
   x = 87,396.00