Finding the Fourth Proportional to 90,670.02, 125,085.81 and 56,619.39

Step by Step Solution

1. Step 1: Write the proportion equation
   90,670.02 : 125,085.81 = 56,619.39 : x
2. Step 2: Convert to fraction form
   90,670.02/125,085.81 = 56,619.39/x
3. Step 3: Cross multiply
   90,670.02x = 125,085.81 × 56,619.39
4. Step 4: Simplify right side
   90,670.02x = 7,082,281,634.43
5. Step 5: Solve for x
   x = 7,082,281,634.43/90,670.02
6. Step 6: Final answer
   x = 78,110.52