Finding the Fourth Proportional to 109,779.68, 151,493.82 and 72,051.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,779.68 : 151,493.82 = 72,051.50 : x
2. Step 2: Convert to fraction form
   109,779.68/151,493.82 = 72,051.50/x
3. Step 3: Cross multiply
   109,779.68x = 151,493.82 × 72,051.50
4. Step 4: Simplify right side
   109,779.68x = 10,915,356,971.73
5. Step 5: Solve for x
   x = 10,915,356,971.73/109,779.68
6. Step 6: Final answer
   x = 99,429.67