Finding the Fourth Proportional to 77,123.64, 106,429.90 and 43,131.74

Step by Step Solution

1. Step 1: Write the proportion equation
   77,123.64 : 106,429.90 = 43,131.74 : x
2. Step 2: Convert to fraction form
   77,123.64/106,429.90 = 43,131.74/x
3. Step 3: Cross multiply
   77,123.64x = 106,429.90 × 43,131.74
4. Step 4: Simplify right side
   77,123.64x = 4,590,506,814.59
5. Step 5: Solve for x
   x = 4,590,506,814.59/77,123.64
6. Step 6: Final answer
   x = 59,521.39