Finding the Fourth Proportional to 191,778.12, 287,678.71 and 58,659.53

Step by Step Solution

1. Step 1: Write the proportion equation
   191,778.12 : 287,678.71 = 58,659.53 : x
2. Step 2: Convert to fraction form
   191,778.12/287,678.71 = 58,659.53/x
3. Step 3: Cross multiply
   191,778.12x = 287,678.71 × 58,659.53
4. Step 4: Simplify right side
   191,778.12x = 16,875,097,919.61
5. Step 5: Solve for x
   x = 16,875,097,919.61/191,778.12
6. Step 6: Final answer
   x = 87,992.82