Finding the Fourth Proportional to 191,499.96, 287,281.08 and 56,577.72

Step by Step Solution

1. Step 1: Write the proportion equation
   191,499.96 : 287,281.08 = 56,577.72 : x
2. Step 2: Convert to fraction form
   191,499.96/287,281.08 = 56,577.72/x
3. Step 3: Cross multiply
   191,499.96x = 287,281.08 × 56,577.72
4. Step 4: Simplify right side
   191,499.96x = 16,253,708,505.54
5. Step 5: Solve for x
   x = 16,253,708,505.54/191,499.96
6. Step 6: Final answer
   x = 84,875.78