Finding the Fourth Proportional to 56,611, 78,126.42 and 31,468.60

Step by Step Solution

1. Step 1: Write the proportion equation
   56,611 : 78,126.42 = 31,468.60 : x
2. Step 2: Convert to fraction form
   56,611/78,126.42 = 31,468.60/x
3. Step 3: Cross multiply
   56,611x = 78,126.42 × 31,468.60
4. Step 4: Simplify right side
   56,611x = 2,458,529,060.41
5. Step 5: Solve for x
   x = 2,458,529,060.41/56,611
6. Step 6: Final answer
   x = 43,428.47