Finding the Fourth Proportional to 99,602.06, 137,450.86 and 54,280.05

Step by Step Solution

1. Step 1: Write the proportion equation
   99,602.06 : 137,450.86 = 54,280.05 : x
2. Step 2: Convert to fraction form
   99,602.06/137,450.86 = 54,280.05/x
3. Step 3: Cross multiply
   99,602.06x = 137,450.86 × 54,280.05
4. Step 4: Simplify right side
   99,602.06x = 7,460,839,553.34
5. Step 5: Solve for x
   x = 7,460,839,553.34/99,602.06
6. Step 6: Final answer
   x = 74,906.48