Finding the Fourth Proportional to 91,557.86, 137,328.98 and 28,376.55

Step by Step Solution

1. Step 1: Write the proportion equation
   91,557.86 : 137,328.98 = 28,376.55 : x
2. Step 2: Convert to fraction form
   91,557.86/137,328.98 = 28,376.55/x
3. Step 3: Cross multiply
   91,557.86x = 137,328.98 × 28,376.55
4. Step 4: Simplify right side
   91,557.86x = 3,896,922,525.54
5. Step 5: Solve for x
   x = 3,896,922,525.54/91,557.86
6. Step 6: Final answer
   x = 42,562.41