Finding the Fourth Proportional to 77,100.67, 115,471.37 and 74,972.45

Step by Step Solution

1. Step 1: Write the proportion equation
   77,100.67 : 115,471.37 = 74,972.45 : x
2. Step 2: Convert to fraction form
   77,100.67/115,471.37 = 74,972.45/x
3. Step 3: Cross multiply
   77,100.67x = 115,471.37 × 74,972.45
4. Step 4: Simplify right side
   77,100.67x = 8,657,171,123.83
5. Step 5: Solve for x
   x = 8,657,171,123.83/77,100.67
6. Step 6: Final answer
   x = 112,284.00