Finding the Fourth Proportional to 56,648.61, 78,173.40 and 31,154.94

Step by Step Solution

1. Step 1: Write the proportion equation
   56,648.61 : 78,173.40 = 31,154.94 : x
2. Step 2: Convert to fraction form
   56,648.61/78,173.40 = 31,154.94/x
3. Step 3: Cross multiply
   56,648.61x = 78,173.40 × 31,154.94
4. Step 4: Simplify right side
   56,648.61x = 2,435,487,430.82
5. Step 5: Solve for x
   x = 2,435,487,430.82/56,648.61
6. Step 6: Final answer
   x = 42,992.89