Finding the Fourth Proportional to 99,779.86, 137,699.04 and 54,460.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,779.86 : 137,699.04 = 54,460.72 : x
2. Step 2: Convert to fraction form
   99,779.86/137,699.04 = 54,460.72/x
3. Step 3: Cross multiply
   99,779.86x = 137,699.04 × 54,460.72
4. Step 4: Simplify right side
   99,779.86x = 7,499,188,861.71
5. Step 5: Solve for x
   x = 7,499,188,861.71/99,779.86
6. Step 6: Final answer
   x = 75,157.34