Finding the Fourth Proportional to 42,847.61, 64,494.86 and 38,772.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,847.61 : 64,494.86 = 38,772.50 : x
2. Step 2: Convert to fraction form
   42,847.61/64,494.86 = 38,772.50/x
3. Step 3: Cross multiply
   42,847.61x = 64,494.86 × 38,772.50
4. Step 4: Simplify right side
   42,847.61x = 2,500,626,443.01
5. Step 5: Solve for x
   x = 2,500,626,443.01/42,847.61
6. Step 6: Final answer
   x = 58,360.94