Finding the Fourth Proportional to 66,516,947.82, 91,126,693.61 and 64,030,057.67

Step by Step Solution

1. Step 1: Write the proportion equation
   66,516,947.82 : 91,126,693.61 = 64,030,057.67 : x
2. Step 2: Convert to fraction form
   66,516,947.82/91,126,693.61 = 64,030,057.67/x
3. Step 3: Cross multiply
   66,516,947.82x = 91,126,693.61 × 64,030,057.67
4. Step 4: Simplify right side
   66,516,947.82x = 5,834,847,447,272,500
5. Step 5: Solve for x
   x = 5,834,847,447,272,500/66,516,947.82
6. Step 6: Final answer
   x = 87,719,711.12