Finding the Fourth Proportional to 72,111.19, 99,448.80 and 60,051.60

Step by Step Solution

1. Step 1: Write the proportion equation
   72,111.19 : 99,448.80 = 60,051.60 : x
2. Step 2: Convert to fraction form
   72,111.19/99,448.80 = 60,051.60/x
3. Step 3: Cross multiply
   72,111.19x = 99,448.80 × 60,051.60
4. Step 4: Simplify right side
   72,111.19x = 5,972,059,818.42
5. Step 5: Solve for x
   x = 5,972,059,818.42/72,111.19
6. Step 6: Final answer
   x = 82,817.38