Finding the Fourth Proportional to 111,577.74, 153,980.43 and 61,279.98

Step by Step Solution

1. Step 1: Write the proportion equation
   111,577.74 : 153,980.43 = 61,279.98 : x
2. Step 2: Convert to fraction form
   111,577.74/153,980.43 = 61,279.98/x
3. Step 3: Cross multiply
   111,577.74x = 153,980.43 × 61,279.98
4. Step 4: Simplify right side
   111,577.74x = 9,435,917,670.79
5. Step 5: Solve for x
   x = 9,435,917,670.79/111,577.74
6. Step 6: Final answer
   x = 84,568.10