Finding the Fourth Proportional to 91,493,039.60, 137,345,847.60 and 55,142,475.20

Step by Step Solution

1. Step 1: Write the proportion equation
   91,493,039.60 : 137,345,847.60 = 55,142,475.20 : x
2. Step 2: Convert to fraction form
   91,493,039.60/137,345,847.60 = 55,142,475.20/x
3. Step 3: Cross multiply
   91,493,039.60x = 137,345,847.60 × 55,142,475.20
4. Step 4: Simplify right side
   91,493,039.60x = 7,573,589,995,105,980
5. Step 5: Solve for x
   x = 7,573,589,995,105,980/91,493,039.60
6. Step 6: Final answer
   x = 82,777,772.26