Finding the Fourth Proportional to 56,649.65, 78,174.72 and 31,155.84

Step by Step Solution

1. Step 1: Write the proportion equation
   56,649.65 : 78,174.72 = 31,155.84 : x
2. Step 2: Convert to fraction form
   56,649.65/78,174.72 = 31,155.84/x
3. Step 3: Cross multiply
   56,649.65x = 78,174.72 × 31,155.84
4. Step 4: Simplify right side
   56,649.65x = 2,435,599,068.36
5. Step 5: Solve for x
   x = 2,435,599,068.36/56,649.65
6. Step 6: Final answer
   x = 42,994.07